Hey car enthusiasts! Today, we're diving deep into the world of performance upgrades with a focus on the G37 sedan and the installation of an ISR single exit exhaust system. If you're looking to unleash some extra horsepower, give your ride a head-turning sound, and add a sleek aesthetic, then you're in the right place. This guide will walk you through the entire process, making it accessible even if you're a DIY newbie. We'll cover everything from the tools you'll need to the final torque specs, ensuring a smooth and successful install. So, grab your tools, and let's get started!

Why Upgrade to an ISR Single Exit Exhaust?

Before we jump into the install, let's chat about why you'd even consider upgrading your G37's exhaust system. The stock exhaust, while functional, often leaves a lot to be desired in terms of both performance and sound. An aftermarket system, like the ISR single exit, offers several key advantages. First and foremost, you can expect a noticeable bump in horsepower and torque. This is achieved by reducing backpressure, allowing your engine to breathe more freely and efficiently. Essentially, it's like taking off a stuffy mask, letting your engine exhale better.

Secondly, the sound. Oh, the sound! The ISR single exit is known for its aggressive and sporty tone. It's the kind of sound that turns heads, letting everyone know you're not messing around. Whether you're cruising down the highway or hitting the track, the exhaust note adds a whole new dimension of enjoyment to your driving experience. The aesthetic improvement is also a significant benefit. The single exit design gives the rear of your G37 a clean, modern look. It's a visual upgrade that complements the car's sporty nature, setting it apart from the crowd. Finally, many aftermarket exhaust systems, including the ISR single exit, are often made from higher-quality materials, such as stainless steel. This means improved durability and resistance to rust and corrosion, ensuring your investment lasts for years to come. In short, upgrading to an ISR single exit exhaust is a win-win, offering performance gains, a fantastic sound, and a stylish appearance. It's a popular modification for G37 sedan owners, and for good reason! So, are you ready to transform the heart of your car?

Tools and Parts You'll Need

Alright, gear up, because we're about to delve into the tools and parts you will need to get this job done! Before you even think about jacking up your G37, make sure you have everything you need. This will save you time, hassle, and those frustrating trips to the auto parts store in the middle of the installation. Here's a comprehensive checklist:

• ISR Single Exit Exhaust System: This is the star of the show! Make sure you have the correct model for your G37 sedan. Double-check that all the components are included, such as the mid-pipe, muffler, hangers, and any necessary hardware. Keep the box in case you need to return it.
• Jack and Jack Stands: Safety first! You'll need a reliable jack to lift your car and sturdy jack stands to support it while you're working underneath. Always use jack stands, never rely solely on the jack.
• Wheel Chocks: These are crucial for preventing your car from rolling. Place them behind the rear wheels before lifting the front.
• Socket Set and Wrenches: A comprehensive socket set with various sizes is a must-have. You'll need both metric and possibly some standard sizes. A set of wrenches, including open-end and box-end wrenches, is also essential for tackling different bolts and nuts.
• Penetrating Oil (e.g., PB Blaster): This stuff is your best friend when dealing with rusty bolts. It helps loosen stubborn fasteners, making your job much easier.
• WD-40: Also a great lubricant that helps parts slide and fit well.
• Torque Wrench: For tightening bolts to the correct specifications, which is crucial for preventing leaks and ensuring everything stays in place.
• Rubber Mallet: Used for gently persuading exhaust components to fit or separate.
• Gloves and Safety Glasses: Protect yourself! Gloves will keep your hands clean and safe from sharp edges, and safety glasses will shield your eyes from debris.
• Jack Point Pads: If you have them, jack point pads will protect your car's frame from damage when using the jack.
• Ratcheting Wrenches: Can make your life much easier, especially in tight spaces.
• Exhaust Hanger Removal Tool: This tool can make the removal of the old hangers much easier.
• Optional - Impact Wrench: An impact wrench can speed up the removal of bolts, especially if they are stubborn. But be careful not to overtighten anything. If you do not have one it is not a big deal.

Make sure to have all of these items on hand before you begin, and you'll be well on your way to a successful ISR single exit exhaust installation on your G37 sedan. This preparation will save you headaches and let you focus on the fun part—the installation itself!

Step-by-Step Installation Guide

Alright, it's time to get your hands dirty and install that ISR single exit exhaust on your beloved G37 sedan! Follow these steps carefully, and you'll have that sweet exhaust note in no time. Remember to work safely and take your time. If you're not comfortable with any of these steps, don't hesitate to seek help from a professional. Safety first, always!

1. Preparation is Key: Start by parking your G37 on a level surface and engaging the parking brake. Place wheel chocks behind the rear wheels. This prevents any accidental movement while you're working. Gather all your tools and parts, making sure everything is within easy reach. This saves time and keeps you organized.
2. Lifting the Vehicle: Locate the designated jack points on your G37's frame. Use your jack to lift the front of the car and securely place jack stands under the frame, ensuring they're properly positioned. The jack stands will bear the weight of the vehicle while you're working underneath, so make sure they are stable and secure. Before you crawl under, give the car a good shake to ensure it's stable. Double check that the parking brake is on.
3. Removing the Factory Exhaust: This is where the fun begins, and it is also where you may discover stubbornness in the bolts! Start by spraying penetrating oil on all the exhaust bolts and connections. Let it soak for a few minutes to help loosen them. Locate the bolts connecting the exhaust to the catalytic converters (or headers, depending on your setup). Carefully remove these bolts, using your socket set or wrenches. It may be necessary to use a breaker bar or impact wrench if the bolts are particularly stubborn. Be patient and apply even pressure to avoid stripping the bolt heads. Next, locate the exhaust hangers. There will be rubber hangers holding the exhaust in place. Use the exhaust hanger removal tool or a pry bar to carefully detach the exhaust from the hangers. Be careful not to damage the hangers or the surrounding components. Now, separate the mid-pipe from the exhaust. You might need to wiggle or gently tap the exhaust components with a rubber mallet to help them come apart. Once all the connections are broken, carefully remove the factory exhaust system. It can be a bit bulky, so have a friend assist you if needed. Set the old exhaust aside – you might want to keep it in case you need to reinstall it in the future.
4. Installing the ISR Single Exit Exhaust: With the old exhaust removed, it's time to install the ISR single exit. Start by connecting the mid-pipe to the catalytic converters or headers, using the hardware provided with the ISR system. Ensure a tight and secure fit. Now, attach the muffler to the mid-pipe. The ISR system should come with clamps or other connectors for this purpose. Make sure the connections are aligned properly before tightening. Attach the ISR exhaust to the existing exhaust hangers, using the new hangers provided with the system, if necessary. You might need to adjust the position of the hangers to ensure proper fitment. At this stage, do a quick visual check to ensure everything lines up correctly and isn't touching any other components. This is also a good time to adjust the exhaust tips for your desired look.
5. Tightening and Torque Specs: This is an extremely important step that ensures a secure and leak-free installation. Using your torque wrench, tighten all the bolts and connections to the manufacturer's specified torque. Refer to the ISR exhaust instructions or consult online resources for the correct torque specs. Don't overtighten the bolts, as this can damage the threads. Tighten them in a crisscross pattern to ensure even pressure. Once everything is torqued to spec, double-check all the connections to ensure they are secure.
6. Final Checks and Lowering the Vehicle: Before lowering the car, inspect the entire exhaust system. Make sure everything is properly aligned, and there are no obstructions. Check for any leaks by starting the engine and listening for unusual noises. If you hear any leaks, re-tighten the connections as needed. Once you're satisfied with the installation, carefully lower the car using the jack. Remove the jack stands and wheel chocks. Take your G37 for a test drive, and listen carefully for any leaks or unusual sounds.

Troubleshooting Common Issues

Even with the best instructions, you may run into a few snags during your ISR single exit exhaust installation on your G37 sedan. Here are some common issues and how to resolve them:

• Stubborn Bolts: Rusty or corroded bolts can be a real pain. The best solution is to use penetrating oil (like PB Blaster) and let it soak for a while. You may need to use a breaker bar or impact wrench for extra leverage. If a bolt breaks, you might need to drill it out and re-tap the threads or use a bolt extractor. Be patient and take your time.
• Exhaust Leaks: If you hear a hissing sound after the installation, you likely have an exhaust leak. Check all the connections and bolts for proper tightness. Ensure the flanges are properly aligned and that the gaskets are seated correctly. If you're still experiencing leaks, you may need to replace the gaskets or use exhaust sealant.
• Misalignment: Sometimes, the exhaust system may not align perfectly. This could be due to manufacturing tolerances or variations in your vehicle. Try loosening all the connections and adjusting the exhaust components until they align properly. You may need to gently bend or adjust the hangers. It is also good practice to make sure the exhaust is centered and does not touch any other parts of the undercarriage.
• Rattling or Vibrations: If you hear rattling or vibrations after the installation, it could be due to the exhaust system contacting other parts of the vehicle. Inspect the entire system for any contact points. You may need to adjust the exhaust hangers or use exhaust wrap to prevent vibrations. Additionally, make sure all the bolts are tightened.
• Difficulty Removing Old Exhaust: The old exhaust may be difficult to remove, especially if it's been on the car for a while. Use a rubber mallet to gently tap the components apart. Be careful not to damage the exhaust system or surrounding components. If you're having trouble, you may need to seek assistance from a friend or a professional mechanic.

Final Thoughts and Enjoying the Sound!

Congratulations! You've successfully installed an ISR single exit exhaust on your G37 sedan! Now it is time to enjoy the improved performance and that amazing sound. Take your car for a spin and experience the difference firsthand. Remember, always prioritize safety throughout the installation process. If you're not comfortable with any step, don't hesitate to seek help from a professional. With a bit of patience, the right tools, and this guide, you can confidently transform your G37 into a more exhilarating ride. So, enjoy the rumble, the performance, and the head-turning looks! You've earned it!

Remember to regularly inspect your exhaust system for any leaks, damage, or loose connections. This will help ensure optimal performance and longevity. And, of course, enjoy the ride! That ISR single exit exhaust will undoubtedly make your driving experience much more fun and engaging. Drive safe, and happy motoring!