Hey guys! So, you're thinking about upgrading your Infiniti G37 sedan's exhaust with an ISR single exit system, huh? Awesome choice! This upgrade not only gives your car a seriously aggressive look with that sweet single exit setup, but it also adds a noticeable growl and can potentially free up some extra horsepower. But, before you dive in, let's talk about the install. It's totally doable for the home mechanic with a decent set of tools and a little bit of patience. This guide will walk you through the entire process, from gathering your tools to firing up that new exhaust for the first time. We'll break down each step so you can confidently tackle this project and transform your G37 into a head-turner. Remember, safety first! Always work in a well-ventilated area, wear eye protection, and consider using jack stands for extra stability. Alright, let's get this show on the road!

Tools and Materials You'll Need

Before we jump into the fun stuff, let's make sure you've got everything you need. You don't want to be halfway through the install and realize you're missing a crucial wrench! Here's a list of tools and materials you'll likely need:

• ISR Single Exit Exhaust Kit: Obviously, this is the star of the show! Make sure you have all the components, including the mid-pipe, muffler, hangers, and any hardware (bolts, nuts, etc.) that came with the kit.
• Jack and Jack Stands: Essential for safely lifting and supporting your car. Never work under a car supported only by a jack.
• Wheel Chocks: For added safety, chock the rear wheels when lifting the front of the car, and vice versa.
• Socket Set and Wrenches: A variety of sizes will be needed to remove the existing exhaust and install the new one. Include both metric and possibly standard sizes.
• Penetrating Oil (like PB Blaster): This stuff is a lifesaver for loosening rusted bolts. Spray it on stubborn bolts and let it soak for a while before attempting to remove them.
• Torque Wrench: For tightening bolts to the correct specifications. Over-tightening can damage the exhaust, while under-tightening can lead to leaks.
• Gloves: Protect your hands from dirt, grime, and sharp edges.
• Safety Glasses: Eye protection is a must!
• WD-40 or similar lubricant: To help slide exhaust components together.
• Rubber Mallet: Useful for gently tapping exhaust components into place.
• Jack Stands: A crucial safety element to ensure the car stays securely elevated while you're working underneath.
• Optional: Exhaust hanger removal tool (makes removing the old hangers much easier).
• Optional: Impact wrench (can speed up the process, but not essential).

Having all the right tools upfront will save you time, frustration, and trips to the hardware store. Double-check your kit to ensure all parts are present. It's also a good idea to lay out all the components and familiarize yourself with their names and how they fit together. This preparation will make the installation process much smoother, believe me! Always prioritize safety by wearing appropriate safety gear, like gloves and eye protection. Having a second pair of hands can be super helpful, especially when maneuvering the exhaust components. So, gather your tools, get ready to get your hands dirty, and let's get started on this G37 exhaust transformation!

Step-by-Step Installation Guide

Alright, now for the main event! Here’s a detailed, step-by-step guide to help you install that ISR single exit exhaust on your G37 sedan. Take your time, follow these instructions carefully, and you'll be enjoying that sweet exhaust note in no time. Remember to read through the entire guide before you start to get a good overview of the process. This will help you avoid any surprises and make the installation even smoother. Let's get to it!

Step 1: Prepare Your Vehicle

• Park your G37 on a level surface and engage the parking brake.
• Chock the rear wheels if you're lifting the front of the car, or the front wheels if lifting the rear.
• Loosen the lug nuts on the rear wheels (you'll be removing them later). Don't remove them completely yet.
• Use the jack to safely lift the rear of the car. Place jack stands under the designated frame points for added support.
• Once the car is securely on jack stands, you can completely remove the rear wheels to gain better access to the exhaust components. This step isn't strictly necessary, but it makes the job easier.

Step 2: Remove the Old Exhaust System

• Spray penetrating oil on all the bolts and connections of the existing exhaust system. This is especially important if your car has seen some miles or lives in a climate where rust is common. Let it soak for at least 15-20 minutes, or even longer for stubborn bolts.
• Start by disconnecting the exhaust hangers. These are usually rubber mounts that hold the exhaust in place. You might need an exhaust hanger removal tool, or you can use a flathead screwdriver to pry them off. Lubricating the hangers with WD-40 can help.
• Locate the bolts connecting the exhaust to the catalytic converters (or the Y-pipe, depending on your setup). These are usually near the front of the exhaust system.
• Unbolt these connections. Be careful, as the bolts can be rusted and difficult to remove. Use your socket set and/or penetrating oil to help. If a bolt is really stubborn, try using a breaker bar or an impact wrench.
• Carefully lower the old exhaust system. It can be heavy, so have someone help you if needed. Be mindful of any wires or sensors connected to the exhaust.

Step 3: Install the ISR Single Exit Exhaust Mid-Pipe

• If your kit includes a mid-pipe (most do), install this first. It usually connects to the catalytic converters or the Y-pipe where the old exhaust was connected.
• Align the mid-pipe with the existing exhaust flanges and install the provided bolts and nuts. Don't tighten them completely yet, leave them a little loose so you can adjust the fit later.
• Ensure that the mid-pipe is properly aligned and doesn't interfere with any other components of the car.

Step 4: Install the ISR Single Exit Muffler

• Now it's time to install the muffler. This is the main part of the single exit exhaust.
• Attach the muffler to the mid-pipe. Most systems use a slip-fit connection, where the muffler slides over the mid-pipe. Use the provided clamp to secure the connection.
• Align the muffler with the rear of the car, making sure the exhaust tip is positioned correctly in the bumper cutout. You might need to adjust the mid-pipe to get the perfect fit.
• Install the exhaust hangers. These will connect the muffler to the car's frame. Make sure they are securely attached.

Step 5: Tighten Everything Up

• Once you're happy with the alignment of the entire exhaust system, it's time to tighten all the bolts and clamps.
• Use a torque wrench to tighten the bolts to the manufacturer's specified torque. If you don't have a torque wrench, tighten them firmly, but be careful not to overtighten them, as this can damage the threads or the exhaust components.
• Double-check all the connections to ensure they are secure.

Step 6: Final Checks and Startup

• Before you lower the car, double-check everything one last time. Make sure all bolts and clamps are tight, and that the exhaust system isn't touching any other parts of the car.
• Carefully lower the car back to the ground.
• Start the engine and check for any exhaust leaks. Listen for any unusual noises.
• If you find any leaks, tighten the bolts or clamps in that area.
• Once you're satisfied that everything is working correctly, take your G37 for a test drive to enjoy that sweet new exhaust note!

Troubleshooting Tips

Even with the best instructions, you might run into a few snags. Here are some troubleshooting tips to help you overcome common challenges:

• Stubborn Bolts: If a bolt is frozen, try applying more penetrating oil and letting it soak for a longer period. You can also use heat from a propane torch to help loosen it, but be careful not to damage any nearby components. An impact wrench is also a great option.
• Alignment Issues: Sometimes, the exhaust components might not line up perfectly. Don't force them. Loosen all the connections and try adjusting the alignment. You might need to rotate or adjust the mid-pipe or muffler to achieve the correct fit.
• Leaks: If you hear exhaust leaks, check the connections at the flanges and clamps. Make sure the bolts are tightened properly. You might also need to use exhaust sealant to create a better seal.
• Rattling or Vibrations: If you hear rattling or vibrations, check that the exhaust system isn't touching any other parts of the car. You might need to adjust the hangers or the exhaust system's position to eliminate the interference.
• Difficulty Removing Hangers: Use a dedicated exhaust hanger removal tool or spray the hangers with WD-40 or a similar lubricant to make removal easier. A pry bar or a sturdy flathead screwdriver can also help.

Post-Installation Maintenance

Once the install is complete, there are a few things you can do to keep your new exhaust system in top shape:

• Regular Inspections: Periodically inspect the exhaust system for any leaks, damage, or loose connections. This is especially important after the first few drives.
• Check Bolt Tightness: After a few weeks of driving, re-torque all the bolts and clamps to ensure they remain secure.
• Clean the Exhaust Tip: Keep the exhaust tip clean to maintain a good appearance. Use a metal polish or cleaner designed for exhaust tips.
• Avoid Harsh Chemicals: Avoid using harsh chemicals or abrasive cleaners on the exhaust system, as they can damage the finish.
• Listen for Changes: Pay attention to any changes in the exhaust sound, as this could indicate a problem.

Enjoy Your Upgraded G37!

Congratulations, you've successfully installed your ISR single exit exhaust! Now it's time to enjoy the improved sound and performance of your G37. Take it for a spin, listen to the rumble, and feel the difference. Remember to drive safely and follow all traffic laws. This exhaust upgrade is a great way to personalize your car and make it stand out from the crowd. So, hit the road, and let that new exhaust sing! And hey, if you run into any issues, don't hesitate to consult online forums, watch install videos, or seek help from a professional mechanic. Happy driving, guys!