What's up, car enthusiasts! Today, we're diving deep into a modification that many G37 Sedan owners have been buzzing about: the ISR Performance single exit exhaust. If you're looking to give your Infiniti G37 Sedan a more aggressive sound, a sportier look, and potentially a little bump in performance, this exhaust system might just be your ticket. We're going to walk you through the installation process, covering everything you need to know to get this bad boy bolted on and sounding epic. So grab your tools, maybe a buddy to help out, and let's get this G37 sounding mean!

Why Choose the ISR Single Exit for Your G37 Sedan?

Alright guys, let's talk about why the ISR Performance single exit exhaust is such a popular choice for the G37 Sedan. First off, let's address the sound. The stock G37 exhaust, while nice, can be a bit too refined for some of us who crave that sporty, aggressive tone. The ISR single exit delivers just that. It provides a deep, resonant rumble at idle that really opens up when you get on the throttle, giving your G37 that unmistakable performance car growl. It's not an obnoxious, fart-can type of noise, but rather a mature, powerful sound that complements the luxury sport sedan vibe of the G37. Beyond the sound, the visual appeal of a single exit exhaust is undeniable. It cleans up the rear end of the car, offering a more streamlined and aggressive look compared to the stock dual exit. This aesthetic upgrade alone is a huge draw for many modders. And let's not forget potential performance gains. While an exhaust system alone won't transform your G37 into a race car, a well-designed system like the ISR can help reduce backpressure, allowing the engine to breathe a bit more freely. This can translate into a subtle but noticeable improvement in throttle response and maybe even a few extra horsepower. For a sedan that already packs a punch, these small gains can really enhance the driving experience. Plus, the quality of construction from ISR Performance is generally well-regarded, using good materials to ensure durability and longevity. So, if you're after a blend of aggressive sound, a cleaner aesthetic, and a slight performance edge, the ISR single exit is definitely worth considering for your G37 Sedan.

Tools and Preparation: Getting Ready for the Install

Before we even think about unbolting the old exhaust, let's get our ducks in a row. Proper preparation is key to a smooth and successful installation, guys. You don't want to be halfway through and realize you're missing a crucial tool or a specific bolt. So, let's talk tools. You'll definitely need a good socket set with various metric sizes, as most of the bolts on your G37's exhaust system will be metric. A ratchet with an extension will be your best friend for those hard-to-reach nuts and bolts. A torque wrench is highly recommended for tightening everything back up to the manufacturer's specifications – we don't want anything rattling loose or getting over-tightened and stripped. You'll also want some penetrating oil (like PB Blaster or WD-40) to spray on those rusty exhaust bolts and hangers. Let them soak for a bit; it makes life so much easier. Safety first, always! You'll need safety glasses to protect your eyes from falling debris and potentially corrosive rust. Work gloves are also a good idea to protect your hands. If you plan on lifting your car for better access, jack stands are an absolute must. Never rely solely on a jack! A car ramp can also be a good alternative. You might also need a hacksaw or reciprocating saw if any of the bolts are seized and won't come off, though hopefully, the penetrating oil does its job. Don't forget new exhaust gaskets and potentially some exhaust sealant or anti-seize compound for the new bolts. It's always a good idea to have these on hand. Before you start, give the area under your car a good once-over. Check the condition of your existing exhaust hangers and the undercarriage. If you find any severely rusted or damaged parts, it might be a good time to address those before installing the new exhaust. Clean up the area where the new exhaust will mate with the mid-pipe. This ensures a good seal. Lastly, have the installation instructions for your specific ISR Performance kit handy. While we're covering the general process here, each kit can have slight variations. So, get your tools ready, ensure your workspace is safe, and let's move on to removing that old exhaust!

Removing the Stock Exhaust System

Alright, it's time to say goodbye to the factory exhaust on your G37 Sedan. This part can sometimes be a bit of a wrestling match, especially if your car has seen a few winters and those bolts are a bit stubborn. First things first, if your car is lowered or you just need better access, make sure it's safely elevated on jack stands or ramps. Ensure you have plenty of space to work underneath. Now, locate the exhaust hangers that connect the stock muffler section to the rest of the exhaust system, typically the mid-pipe. There are usually rubber isolators that the exhaust pipes slide into. You'll want to spray these generously with your penetrating oil. Let it sit for a good 10-15 minutes, or even longer if you have the time. This is crucial for making removal easier. If you have a dual exit exhaust, you'll have hangers on both sides. Carefully use a pry bar or a specialized exhaust hanger removal tool to slide the rubber hangers off the metal pegs. Be firm but careful not to tear the rubber completely if you plan on reusing them, although new ones are often recommended. Once the hangers are free, you'll need to address the bolts connecting the muffler section to the mid-pipe. These are often flange bolts. Again, spray them with penetrating oil and give them time to work. Use your socket set and ratchet to loosen and remove these bolts. If they're really stuck, you might need to apply some heat (carefully!) or, as a last resort, use a hacksaw or reciprocating saw to cut them off. Be extremely cautious if you resort to cutting, ensuring you don't damage the mid-pipe. Once all the bolts are removed and the hangers are disconnected, the stock muffler section should be free. It might be heavy, so be prepared to support it as you lower it down. If you're doing this alone, it can be a bit awkward. Sometimes, it's easier to remove the exhaust in sections. For the G37 Sedan, you're typically removing the muffler assembly. Carefully lower the stock exhaust and set it aside. Take a moment to inspect the mid-pipe connection point. Make sure it's clean and free of any significant rust or damage. If there are any issues, now is the time to address them before you install the new ISR system. And there you have it – the stock exhaust is off, and you're one step closer to that awesome new sound!

Installing the ISR Single Exit Exhaust

Now for the exciting part, guys – getting that new ISR Performance single exit exhaust onto your G37 Sedan! This is where all your prep work pays off. First, grab your new ISR muffler section and the necessary hardware that came with your kit. You'll likely need new gaskets and potentially new bolts if your kit didn't come with them or if your old ones were damaged. Position the new ISR muffler section up into place, aligning it with the flange on your G37's mid-pipe. This is where having a friend can be a lifesaver, as holding the muffler in place while you thread bolts can be tricky. Carefully thread in the new bolts and nuts. Do not tighten them fully just yet. We want to keep everything a bit loose so you can make minor adjustments to get the alignment perfect. Once the muffler is loosely bolted to the mid-pipe, you can re-attach the exhaust hangers. Slide the rubber isolators onto the pegs on the new ISR muffler. Make sure they are seated properly and securely. Now, you'll want to go back to those flange bolts connecting the muffler to the mid-pipe. Using your torque wrench, tighten these bolts evenly in a crisscross pattern. This ensures that the gasket seals properly and prevents any leaks. Refer to your ISR Performance installation manual for the specific torque specifications. Overtightening can damage the gasket or the flange, while undertightening can lead to exhaust leaks. Once those are torqued down, give the entire exhaust system a gentle shake and check for any movement or rattling. Ensure everything is securely mounted. Finally, and this is crucial for sound and performance, double-check all connections. Make sure there are no exhaust leaks at the flange. You can often detect small leaks by listening for a hissing sound or by looking for black soot marks around the connection point. If you find any leaks, you might need to re-torque the bolts or check the condition of your gasket. Once you're confident everything is tight, secure, and leak-free, you've successfully installed your ISR single exit exhaust! Give yourself a pat on the back!

Final Checks and First Start-Up

Alright, almost there, guys! Before we fire up the engine and unleash that new sound, we need to do some final checks. This is a critical step to ensure everything is safe and properly installed. First, re-inspect all the bolts and hangers you've worked on. Go around and give them a gentle nudge to make sure they are all tight and secure. Pay special attention to the bolts connecting the new ISR muffler to the mid-pipe – these need to be torqued correctly. Check the exhaust hangers to ensure they are properly seated and not stressed at an odd angle, which could lead to premature wear or failure. Look for any signs of interference. Make sure the new exhaust system isn't rubbing against any other components underneath your car, like the driveshaft, fuel tank, or body panels. Any contact can cause annoying rattles or even damage over time. If you notice any slight rubbing, you might need to adjust the position of the exhaust slightly by loosening the bolts, repositioning, and then re-tightening. Now, for the moment of truth: the first start-up. It's a good idea to have someone else present for this, especially if you're still working under the car or just want an extra pair of eyes and ears. Start the engine. Listen carefully. You're looking for a smooth idle and that deep, aggressive tone you were expecting from the ISR single exit. Listen for any unusual noises like rattling, buzzing, or any signs of exhaust leaks (a hissing sound is a common indicator). If you hear any leaks, shut off the engine immediately and go back to check the connection points and torque settings. A small leak can affect the sound and even reduce performance. Once you're satisfied with the sound and you've confirmed there are no leaks, let the car idle for a few minutes. This allows the exhaust system to heat up, which can sometimes reveal subtle leaks that weren't apparent when cold. After it's idled and you're happy, it's time for a short test drive. Drive gently at first, listening for any new noises or vibrations. Gradually increase your throttle input to hear how the exhaust sounds under load. The sound profile will change as the exhaust heats up and the packing material settles in. It's normal for new exhausts to sound a bit different during the first few drives as everything breaks in. So, take it easy for the first 50-100 miles. Congratulations, you've successfully installed your ISR Performance single exit exhaust on your G37 Sedan! Enjoy that new sound and the enhanced driving experience, guys!

Post-Installation Care and Tips

So, you've successfully bolted on that sweet ISR Performance single exit exhaust to your G37 Sedan, and you're loving the new sound. Awesome! But the job isn't quite done yet, guys. We need to talk about keeping this new piece of art in top condition and ensuring it continues to perform and sound great for a long time. First and foremost, regular visual inspections are your best friend. Every now and then, especially after driving in rough weather or on poorly maintained roads, take a quick peek underneath your car. Look for any signs of damage, dents, or excessive rust developing on the exhaust piping or muffler. Check those hangers again – make sure they're still in good condition and securely holding the exhaust. Remember that penetrating oil you used earlier? You might want to keep a can handy. If you live in an area with harsh winters and a lot of road salt, consider applying a protective coating like a high-temperature ceramic spray or a rust inhibitor to the exhaust system. This can significantly extend its lifespan and keep it looking good. It's not strictly necessary for stainless steel systems, but it's cheap insurance against corrosion, especially on the welds or any carbon steel components. Listen to your exhaust during your daily drives. Any new rattles, vibrations, or changes in the exhaust note could indicate a loose bolt, a failing hanger, or even a developing crack. Don't ignore these signs! Address them promptly before they become bigger problems. When you're washing your car, don't forget the exhaust tips. If you have polished stainless steel or carbon fiber tips, keeping them clean will make your G37's rear end look much sharper. Use a good quality metal polish for stainless steel tips to keep them gleaming. For carbon fiber, a simple wash with soap and water is usually sufficient, followed by a detail spray to maintain the gloss. Be mindful of where you park. Try to avoid parking over deep potholes or speed bumps at an aggressive angle, which can put undue stress on the exhaust system and its hangers. Finally, remember that while the ISR single exit is designed for performance, don't expect miracles. It's a great modification, but it's part of a larger system. If you're looking for more significant power gains, you'll want to consider other supporting modifications like intake systems, headers, and tuning. But for that aggressive sound and improved aesthetics, this exhaust is a fantastic choice. By following these simple post-installation care tips, you'll ensure your ISR single exit exhaust remains a proud and functional part of your G37 Sedan for many miles to come. Happy driving!