1999 seadoo gtx engine rebuild kit – 1999 Sea-Doo GTX engine rebuild kit: Unleash the potential of your aging watercraft with this comprehensive guide. This detailed journey will navigate you through the intricacies of rebuilding your 1999 Sea-Doo GTX engine, from initial diagnosis to the satisfying roar of a revitalized motor.
This guide covers everything from identifying compatible rebuild kits and understanding the essential disassembly procedures to installing components, reassembling the engine, and performing crucial troubleshooting steps. We’ll also delve into the vital aspects of long-term maintenance to keep your rejuvenated engine running smoothly for years to come. Get ready to embark on a rewarding project that will transform your watercraft into a powerful machine, ready for action on the open water.
Introduction to 1999 Sea-Doo GTX Engine Rebuild Kits

The 1999 Sea-Doo GTX, a popular watercraft of its time, boasted a powerful engine that provided exhilarating rides on the water. However, like any machine, these engines experience wear and tear over time. Understanding the typical issues and the benefits of a quality rebuild kit can help owners make informed decisions about maintaining their prized watercraft.The 1999 Sea-Doo GTX engines, while robust, are susceptible to common wear and tear issues.
These include issues with piston rings, valve seals, and bearings. Over time, these components can experience significant wear, leading to decreased performance, increased fuel consumption, and potentially, engine failure. Addressing these issues proactively with a quality rebuild kit is often more cost-effective than replacing the entire engine.
Typical Wear and Tear Issues
Engines, even those well-maintained, inevitably face wear. The 1999 Sea-Doo GTX engines are prone to issues with piston rings and valve seals, leading to leaks and reduced power. Bearing degradation can cause excessive noise and vibration, while head gasket failure can lead to coolant leaks. Understanding these common issues is crucial for informed decision-making regarding maintenance.
Importance of a Quality Rebuild Kit
Using a quality rebuild kit is paramount for restoring the engine’s optimal performance and longevity. A substandard kit might contain components that don’t meet the exacting standards of the original equipment manufacturer (OEM). This can lead to premature failure and potentially expensive repairs in the long run. A well-chosen kit will feature high-quality materials, ensuring a dependable and durable restoration.
Reasons for Considering a Rebuild
Owners might consider a rebuild for a multitude of reasons. Performance issues, such as decreased power or increased fuel consumption, often signal the need for attention. Excessive noise and vibration during operation can also indicate internal component wear. Furthermore, addressing issues early on through a rebuild can prevent more significant, costly problems in the future. This proactive approach can save owners considerable expense and time.
Rebuild Kit Comparison Table
This table provides a comparative overview of different rebuild kit brands and types. It helps owners make informed decisions based on factors such as price, quality, and component selection.
Brand/Type | Price Range (USD) | Key Features | Customer Reviews (General Sentiment) |
---|---|---|---|
Brand A (OEM) | $XXX – $YYY | High-quality components, extensive warranty | Positive; durable and reliable |
Brand B (Premium) | $XXX – $YYY | Advanced materials, precise engineering | Positive; good value for performance |
Brand C (Budget-Friendly) | $XXX – $YYY | Essential components, cost-effective option | Mixed; some reported quality concerns |
Note: Price ranges are estimates and may vary based on specific components and retailer. Customer reviews are general assessments based on readily available online sources.
Identifying Compatible Rebuild Kits: 1999 Seadoo Gtx Engine Rebuild Kit
Getting your 1999 Sea-Doo GTX engine back in tip-top shape involves more than just throwing parts together. Careful selection of a rebuild kit is crucial for a smooth, reliable, and lasting restoration. Knowing the specifics of your engine is paramount.A well-chosen rebuild kit can breathe new life into your Sea-Doo, allowing you to enjoy countless hours of exhilarating rides.
Conversely, an ill-fitting kit can lead to frustration and wasted money. The process of identifying the right kit hinges on understanding your engine’s unique characteristics.
Specific Engine Model and Serial Number
Accurate identification of your engine model and serial number is essential for selecting the correct rebuild kit. These numbers are unique identifiers, ensuring the kit components precisely match your engine’s specifications. This crucial step prevents incompatibility issues and ensures a perfect fit.
Factors in Choosing a Rebuild Kit
Several factors influence the selection of a suitable rebuild kit. Parts quality is paramount; look for kits from reputable brands known for their durability and reliability. Price is also a consideration, but prioritize quality over the lowest cost. Consider the brand reputation; established brands often offer superior support and parts availability. Ultimately, a balance of quality, price, and brand reputation will guide your decision.
Aftermarket vs. OEM Rebuild Kits
Aftermarket rebuild kits offer a cost-effective solution, while OEM (Original Equipment Manufacturer) kits guarantee precise fit and compatibility. Aftermarket kits often provide a balance of performance and affordability. OEM kits, however, are generally more expensive but offer unmatched quality and reliability. The best choice depends on your budget and desired level of performance.
Parts Included in a Complete Rebuild Kit
A complete rebuild kit typically includes a comprehensive set of components necessary for a complete engine overhaul. These parts include, but are not limited to, pistons, rings, bearings, gaskets, seals, and more. The specific parts list may vary depending on the kit and the engine model. This thoroughness ensures that you have all the necessary parts in one convenient package.
Compatibility Table for 1999 Sea-Doo GTX Engine Models
This table provides a general guide to the compatibility of different rebuild kits with various 1999 Sea-Doo GTX engine models. Consult your specific engine’s documentation for precise compatibility information.
Engine Model | Compatible Rebuild Kit (Example) | Notes |
---|---|---|
GTX 1100 | XYZ-1234 (Aftermarket) | Verify compatibility with your specific serial number. |
GTX 1300 | ABC-5678 (OEM) | Check for fitment with your serial number and model year. |
GTX Limited | DEF-9012 (Aftermarket) | Confirm compatibility with the specific engine configuration. |
Engine Disassembly and Preparation

Getting your 1999 Sea-Doo GTX engine ready for a rebuild is a meticulous process, requiring careful attention to detail at every step. Success hinges on precise disassembly, thorough cleaning, and a vigilant inspection of every part. This section provides a comprehensive guide to ensure your rebuild is a triumph, not a trial.Thorough disassembly, meticulous cleaning, and careful inspection are critical for a successful engine rebuild.
Each component must be treated with respect, as its condition directly impacts the engine’s performance and longevity. Following these steps ensures the rebuild is not just about replacing parts but about restoring the engine to optimal working order.
Disassembly Procedures
Careful disassembly is the first step toward a successful rebuild. Each component must be removed systematically and stored properly to avoid damage or misplacement. Using the correct tools is essential for efficient and safe work.
- Begin by removing the engine’s primary components, such as the cylinder head, crankshaft, and connecting rods, in a sequence that prevents cross-threading or damage to internal parts. Careful documentation of the disassembly process, including photographs, is highly recommended for reference during reassembly.
- Carefully detach all electrical components and hoses, noting their connections for accurate reassembly. Using labels or diagrams can significantly reduce the risk of misconnections and aid in the reassembly process.
- Use appropriate tools to remove fasteners, ensuring proper torque specifications are met to avoid potential damage during reassembly. Record the torque values for each fastener in a notebook or digital document for later reference.
Cleaning and Inspection
Thorough cleaning of each component is crucial to identify potential damage and ensure proper function. Cleaning not only removes contaminants but also allows for a clear assessment of the component’s condition.
- Soak components in a suitable cleaning solution, ensuring the solution does not harm the material of the component. Avoid using harsh chemicals that could damage the metal or plastic parts.
- Inspect each component for any signs of wear, damage, or corrosion. Take note of any discrepancies and document them with photos or written descriptions for later reference.
- Pay close attention to the condition of gaskets, seals, and O-rings. Damaged or deteriorated seals can lead to leaks or other problems in the engine. Replace any worn or damaged seals and gaskets to ensure a proper seal.
Critical Component Inspection
Inspecting critical parts for damage is vital to ensure the engine’s reliability. Visual inspection is the first step; further examination may be necessary.
- Examine the cylinder bores for scoring, cracks, or excessive wear. Measure the bore diameter for comparison to original specifications.
- Inspect the crankshaft for any bending, cracks, or significant wear on the journals. Ensure that the bearings are in good condition and the oil passages are unobstructed.
- Carefully inspect the connecting rods for cracks, bending, or excessive wear. Check the condition of the rod bearings and the alignment of the piston pins.
Addressing Damage
Identifying damage is one thing; addressing it effectively is another. Proper handling and replacement are key.
- If significant damage is found, consult a qualified technician or repair manual for guidance on repair or replacement. If the damage is beyond repair, consider replacing the affected part.
- Replace worn or damaged parts with OEM (Original Equipment Manufacturer) components or high-quality aftermarket parts. Using compatible parts is crucial for optimal performance and longevity.
- Take note of the replacement parts and their specifications. This information will be important for the reassembly process.
Tools Required for Disassembly
Proper tools are essential for safe and efficient disassembly. Using the wrong tools can lead to damage and complications.
Tool | Description | Use |
---|---|---|
Socket Set | Various sizes of sockets | Removing bolts and nuts |
Torque Wrench | Measures and applies torque | Ensuring proper tightening of fasteners |
Screwdrivers | Flathead and Phillips | Removing screws |
Pliers | Needle-nose and slip-joint | Grasping and holding small parts |
Engine Hoist | Supports the engine | Facilitating access to various parts |
Installing the Rebuild Kit Components
Getting your 1999 Sea-Doo GTX engine back to its roaring best involves meticulous installation of each rebuild kit component. Precise handling and adherence to the manufacturer’s instructions are paramount. This section will guide you through the installation process, highlighting critical steps and common pitfalls to avoid.
Installing the Crankshaft
The crankshaft is a vital component. Ensure the crankshaft is properly aligned with the bearings and journals. Incorrect alignment can lead to significant engine damage. Carefully examine the crankshaft for any imperfections before installation. Use the provided installation tools for precise placement and torque.
Consult the manufacturer’s diagram for the correct positioning of the crankshaft bearings and journals.
Installing the Pistons and Rings
Pistons and rings are critical to engine performance. Correct piston ring installation is crucial for sealing the combustion chamber and preventing leaks. Ensure the rings are correctly seated in the grooves of the piston. Apply a thin film of the recommended engine oil to the piston rings to aid in smooth installation. Examine the pistons for any damage or distortion before installation.
Installing the Connecting Rods
Connecting rods connect the pistons to the crankshaft. Proper installation of the connecting rods is vital for transferring power effectively. Ensure that the connecting rods are properly aligned with the crankshaft journals and pistons. Check the connecting rod bearings for proper seating and lubrication before installation. Verify the correct torque settings for connecting rod bolts.
Installing the Valves and Valve Springs
Precise valve installation is critical for optimal engine function. Ensure proper valve seat alignment and proper valve spring installation to prevent leaks and damage. The valve springs are crucial for maintaining proper valve closure. Follow the manufacturer’s instructions for correct valve spring preload.
Installing the Cylinder Head
The cylinder head is the capstone of the engine’s assembly. Correctly installing the cylinder head is essential for sealing the combustion chamber and preventing leaks. Ensure the head gasket is correctly positioned and free of wrinkles. Proper torque settings are critical for sealing the cylinder head. Verify the correct gasket type for your specific engine model.
Importance of Manufacturer’s Instructions
“Adherence to the manufacturer’s instructions is paramount for a successful engine rebuild.”
Strict adherence to the manufacturer’s instructions is critical. These instructions are tailored for your specific engine model and are designed to ensure proper functionality and longevity. Following these guidelines prevents potential damage and ensures optimal performance.
Crucial Points to Remember During Installation
- Thoroughly clean all parts before installation to remove any contaminants or debris.
- Use the correct tools and lubricants as specified in the manufacturer’s instructions.
- Double-check all measurements and torque specifications.
- Pay close attention to the alignment of components.
- Take your time and be methodical in your approach.
Identifying and Preventing Common Installation Errors
Incorrect installation can lead to catastrophic engine failure. Common errors include misalignment, incorrect torque settings, and improper lubrication. Thorough preparation and attention to detail can help you avoid these pitfalls. Using the correct tools and following the provided diagrams are key preventative measures.
Comparison of Installation Methods
Installation Method | Pros | Cons |
---|---|---|
Method A | Simple and efficient | May require more time and effort for precise alignment |
Method B | Precise and controlled | Potentially more time-consuming |
Method C | Faster and straightforward | Higher risk of error due to reduced precision |
Engine Reassembly and Testing
Bringing your 1999 Sea-Doo GTX back to life after a meticulous rebuild is a rewarding experience. Careful reassembly is crucial for optimal performance and longevity. Following the correct procedures, including torque specifications, ensures a robust and reliable engine. This section details the steps for reassembling your engine and performing vital post-reassembly tests.Thoroughness is paramount in this stage.
Each component plays a vital role in the engine’s functionality. Skipping a step or using incorrect torque values can lead to significant issues down the road. This meticulous process guarantees a smooth, powerful, and long-lasting engine.
Reassembly Procedure
The reassembly process is a step-by-step operation that builds upon previous steps. Each step, from the smallest gasket to the most significant component, is essential. Ignoring a step can lead to costly mistakes. Precision is critical for a flawless outcome.
- Crankshaft Alignment and Placement: Ensure the crankshaft is aligned correctly with the connecting rods and bearings. Misalignment can lead to significant issues. A perfectly aligned crankshaft is crucial for smooth rotation and minimal wear.
- Crankcase Assembly: Carefully install the various seals, gaskets, and components of the crankcase. A leak in this area can lead to significant fluid loss. Tighten fasteners in a specific order to prevent distortion and damage.
- Valve Train Assembly: Precisely position the valves, springs, and associated components. Proper valve timing is essential for the engine’s efficiency. Incorrect timing can lead to poor performance and significant engine damage.
- Cylinder Head Assembly: Carefully install the cylinder head. Ensure proper seating of the gasket and the bolts. Proper gasket installation is essential for preventing leaks and ensuring a secure seal.
- Wiring Harness Connections: Correctly connect all wiring harnesses. Incorrect connections can lead to electrical issues. Verify each connection for security and proper fitment. Verify that each connection is secure and properly fitted to prevent any short circuits or malfunctions.
- Fuel System Installation: Install the fuel injectors, fuel lines, and fuel pump, ensuring proper connections. This process involves careful attention to the correct routing and connections to prevent leaks. A properly functioning fuel system is essential for consistent engine operation.
Torque Specifications
Accurate torque values are critical for secure assembly and preventing component damage. Incorrect torque can lead to stripping or breakage of fasteners, which can be very costly to repair. Using a torque wrench is highly recommended. Refer to the manufacturer’s service manual for precise torque specifications for each component. The torque values are specific to the engine model and must be followed precisely.
- Crankshaft Pulley Bolts: Use a torque wrench to ensure proper tightening to prevent stripping.
- Cylinder Head Bolts: Apply precise torque to prevent warping or damage to the cylinder head. Use a torque wrench for precise tightening. Over-tightening can lead to damage.
- Engine Mount Bolts: Ensure correct torque for secure mounting. Properly tightened bolts are critical for the engine’s stability. Improper torque can lead to vibrations and damage to the mounting points.
Leak Test Procedure
A leak test is an essential step in ensuring a proper assembly. A leak can lead to loss of coolant or oil, and potential engine damage. Perform a leak test after reassembly to identify any potential issues. Use soapy water to detect air bubbles or leaks.
- Visual Inspection: Thoroughly inspect all visible joints, seams, and connections for any signs of leakage. Pay particular attention to areas where fluids are present.
- Soapy Water Application: Apply a soapy water solution to all potential leak points. Look for bubbles indicating a leak.
- Pressure Testing: If the visual inspection is inconclusive, perform a pressure test using the appropriate equipment and pressure. This is often used to test for coolant leaks.
Reassembly Order Table
| Step | Component | Importance ||—|—|—|| 1 | Crankshaft Alignment | Critical for smooth operation || 2 | Crankcase Assembly | Prevents leaks || 3 | Valve Train Assembly | Ensures proper valve timing || 4 | Cylinder Head Assembly | Essential for combustion || 5 | Wiring Harness Connections | Crucial for electrical function || 6 | Fuel System Installation | Necessary for engine operation || 7 | Leak Test | Ensures a leak-free assembly |
Troubleshooting Common Issues
Taking on a Sea-Doo GTX engine rebuild is a rewarding project, but potential hiccups are part of the process. Knowing how to identify and resolve common problems is key to a successful outcome. This section details troubleshooting steps to help you navigate any snags along the way.
Potential Issues During the Rebuild Process
Several issues can crop up during the meticulous process of disassembling and reassembling your engine. Misaligned components, damaged gaskets, or improperly tightened fasteners can all lead to headaches later. Careful attention to detail and thoroughness are crucial during each step.
Diagnosing Common Engine Problems
Accurate diagnosis is the first step in any repair. Careful observation and systematic checks will help you pinpoint the root of the problem. This includes visually inspecting components for damage, verifying proper clearances, and ensuring all connections are secure. Use appropriate tools and techniques for each inspection step. Detailed documentation of each step, including measurements and observations, will prove invaluable.
Resolving Typical Issues Encountered
Once you’ve diagnosed the problem, the solution often becomes clearer. Addressing issues promptly and effectively will save you time and frustration. For instance, a leaking gasket might necessitate replacement. Incorrectly torqued fasteners could lead to stripped threads or damaged components. Appropriate tightening procedures, and using correct torque specifications, are vital.
Potential Causes for Engine Malfunction After the Rebuild
Even after a meticulous rebuild, engine malfunction can occur. Incorrect reassembly, overlooked damage, or inadequate component compatibility can all contribute. Ensure all parts are correctly installed and that there are no residual issues from the initial disassembly. Checking the engine’s operation after each major assembly step will catch any problems early. This proactive approach will ensure that the engine runs smoothly.
Common Problems and Solutions
Problem | Potential Cause | Solution |
---|---|---|
Engine Won’t Start | Low compression, faulty spark plugs, fuel delivery issues, electrical problem | Check compression, replace spark plugs, inspect fuel lines and pump, test electrical connections. |
Engine Runs Rough | Misaligned components, improper valve adjustment, air leaks, worn piston rings | Re-check component alignment, adjust valves, seal any air leaks, inspect piston rings. |
Engine Overheats | Faulty thermostat, blocked coolant passages, low coolant levels, damaged water pump | Replace thermostat, clean coolant passages, top off coolant, inspect and replace water pump if necessary. |
Excessive Oil Consumption | Damaged piston rings, worn valve stem seals, leaking gaskets, incorrect oil type | Inspect and replace piston rings, valve stem seals, and gaskets as needed, ensure correct oil type and viscosity. |
Leaks | Faulty gaskets, cracked or damaged engine parts, loose connections | Replace gaskets, repair or replace damaged parts, tighten loose connections. |
Maintenance and Long-Term Care
Keeping your rebuilt 1999 Sea-Doo GTX running smoothly and strong for years to come requires a proactive approach to maintenance. Proper care ensures peak performance, avoids costly repairs, and maximizes the enjoyment you get from your revitalized watercraft. Think of it as investing in the long-term happiness of your machine.Regular maintenance is crucial for preserving the engine’s longevity and performance.
Just like a well-maintained car, a well-maintained watercraft engine will reward you with years of trouble-free operation. Neglecting these steps can lead to costly repairs down the road, so consider this your guide to keeping your Sea-Doo humming like a well-oiled machine.
Essential Maintenance Procedures
Routine maintenance procedures are essential to ensure the continued smooth operation of your rebuilt engine. Consistent checks and servicing will help prevent potential issues and ensure your engine continues performing at its best.
- Regular oil changes are critical. Follow the manufacturer’s recommendations for oil type and change intervals. Using the correct oil viscosity and adhering to the specified change intervals will significantly impact engine health.
- Inspect the cooling system for leaks or corrosion. A healthy cooling system is vital for engine longevity. Regular visual inspections can identify issues early, preventing overheating and potential damage.
- Clean and lubricate all moving parts. This will ensure smooth operation and prevent premature wear. Pay close attention to areas like the drive train, and ensure they are adequately lubricated with the appropriate lubricants.
- Check spark plug condition. A visual check for damage or fouling is a crucial step. A worn or fouled spark plug will result in poor engine performance.
Significance of Regular Maintenance
Regular maintenance is more than just a chore; it’s an investment in the future of your engine. Regular upkeep translates to longer engine life, reduced repair costs, and improved performance. A well-maintained engine will provide years of reliable service.
- Early detection of potential problems. Regular inspections catch issues before they escalate into major problems, saving you money and stress.
- Prolonging engine life. Consistent care and maintenance help extend the life of your rebuilt engine, minimizing the need for costly replacements.
- Optimizing performance. Well-maintained engines perform better, ensuring a smoother and more enjoyable riding experience.
Recommended Fluids and Lubricants
Using the correct fluids and lubricants is essential for optimal engine performance and longevity. Employing the recommended lubricants and fluids is a key aspect of successful engine maintenance.
- Use the recommended engine oil. Following the manufacturer’s specifications for oil type and viscosity is crucial. Using the correct oil helps maintain the engine’s internal components.
- Maintain proper coolant levels. Ensuring adequate coolant prevents overheating, which can lead to engine damage. Correct coolant levels will protect the engine from potential thermal issues.
- Use appropriate transmission fluid. Proper transmission fluid is crucial for smooth and efficient gear shifting. This contributes to the overall operation of the engine and the performance of the watercraft.
Importance of Periodic Checks and Inspections
Periodic checks and inspections are vital for proactive maintenance and preventing potential problems. Regular inspections and checks will help identify and address any potential issues early on.
- Visual inspections. Regular visual checks can reveal leaks, damage, or unusual wear, allowing for timely repairs.
- Listening for unusual noises. Listening for unusual sounds like knocking or grinding can alert you to mechanical issues early on.
- Checking fluid levels. Regular checks of oil, coolant, and other fluids ensure adequate lubrication and prevent potential damage.
Recommended Maintenance Schedule
A structured maintenance schedule ensures that all essential tasks are performed on time. This schedule will ensure that your engine receives the care it needs to operate at its best.
Maintenance Task | Frequency |
---|---|
Oil change | Every 50 hours of operation or as per manufacturer recommendations |
Coolant inspection | Every 100 hours of operation or as per manufacturer recommendations |
Transmission fluid check | Every 100 hours of operation or as per manufacturer recommendations |
Spark plug inspection | Every 100 hours of operation or as per manufacturer recommendations |
Visual inspection of all components | Weekly or as needed |
Advanced Techniques and Considerations

Unleashing the full potential of your 1999 Sea-Doo GTX engine rebuild demands more than just a straightforward swap of parts. Diving into advanced techniques opens doors to performance enhancements and a deeper understanding of the engine’s inner workings. Let’s explore these crucial steps.This section delves into advanced techniques and considerations for a thorough 1999 Sea-Doo GTX engine rebuild.
These techniques will not only ensure a successful rebuild but also unlock potential performance gains. We’ll cover specialized tools, alternative procedures, and performance enhancements.
Precision Piston Ring Installation
Proper piston ring installation is paramount for optimal engine performance and longevity. Incorrect installation can lead to significant issues, such as leaks, oil consumption, and premature wear. A critical step is ensuring proper ring end gap. This gap allows for expansion and contraction during operation. Over- or under-gaging can compromise seal integrity.
Utilizing specialized ring compressors and measuring tools is essential for accuracy. A well-fitted ring set translates to reduced friction and enhanced sealing, ultimately leading to improved engine efficiency.
Crankcase Pressure Testing
A critical step in any engine rebuild is crankcase pressure testing. This crucial procedure identifies potential leaks in the crankcase before reassembly, saving you time and resources. Leak detection helps ensure a robust seal, preventing future issues. Specialized pressure gauges and leak detection solutions are essential for this step. This method allows for a thorough check of all seals, gaskets, and joints.
Balancing Crankshaft and Connecting Rods, 1999 seadoo gtx engine rebuild kit
Balancing the crankshaft and connecting rods is crucial for minimizing vibration and maximizing engine performance. Significant imbalance can result in excessive vibration, damaging the engine and potentially affecting the overall ride experience. Specialized equipment, such as balancing machines, is required for accurate balancing. Proper balancing ensures smooth operation, extending engine life and improving overall performance.
Engine Performance Enhancements
Engine rebuilds offer a chance to enhance performance. This involves upgrading components like the exhaust system or the intake manifold. Careful consideration of the potential gains and costs is critical. An upgraded exhaust system can improve flow and increase horsepower. For example, replacing the stock exhaust with a high-performance system can result in a noticeable improvement in acceleration and top speed.
Careful consideration of component compatibility and installation procedures is essential.
Advanced Techniques Summary
Engine Component | Technique | Effectiveness |
---|---|---|
Piston Rings | Specialized ring compressors and measuring tools | Enhanced sealing, reduced friction |
Crankcase | Pressure testing using specialized gauges | Early leak detection, improved sealing |
Crankshaft & Connecting Rods | Balancing on specialized machines | Minimized vibration, maximized performance |
Exhaust System | Upgrading to high-performance exhaust | Improved flow, increased horsepower |