If you're looking to swap out your 2007 g35 sedan exhaust, you probably already know that the VQ35HR engine under the hood has one of the most distinct notes in the car world. That signature "trumpet" sound is something Infiniti owners either absolutely love or desperately want to tweak. The 2007 model year was a bit of a turning point because it introduced the redesigned V36 chassis for the sedan, which means it breathes a bit differently than the earlier models.
Picking the right setup isn't just about making the car louder; it's about finding that sweet spot where the car sounds aggressive under throttle but doesn't make your ears bleed while you're just trying to cruise down the highway. Let's break down what you should be looking for and what actually works for this specific car.
Why bother changing the stock setup?
The factory 2007 g35 sedan exhaust is actually pretty well-engineered for a luxury sport sedan. It's quiet enough for a professional environment but has a little growl when you step on it. However, "pretty good" usually isn't enough for those of us who like to hear the engine work. The stock pipes are somewhat restrictive, and the resonators are designed to kill a lot of the character that the HR engine naturally wants to put out.
By opening things up, you aren't just getting a better sound; you're often picking up a bit of throttle response. While you shouldn't expect a massive horsepower gain from an exhaust alone, the car definitely feels "breathier" and more eager to rev. Plus, the stock mufflers are heavy. Replacing them with a high-quality aftermarket system can actually shave off a decent chunk of weight from the rear of the car.
Cat-back vs. Axle-back: What's the difference?
When you start shopping, you'll mostly see two types of systems. If you're on a budget or just want a cosmetic and minor sound upgrade, an axle-back is the way to go. This basically just replaces the mufflers and the tips. It's an easy "driveway install" and gives you that look you're likely after without being too obnoxious.
But if you really want to change the tone and flow, a full cat-back system is the real deal. This replaces everything from the catalytic converters all the way to the back. For a 2007 g35 sedan exhaust upgrade, this is where you see the most benefit. You get a new Y-pipe, mid-pipe, and the rear section. Since the 2007 sedan uses a true dual-path setup into a single mid-section (depending on the brand), a cat-back allows you to maximize the diameter of the piping for better flow.
Dealing with the dreaded VQ drone
If there's one thing that ruins a G35 experience, it's drone. Drone is that deep, vibrating hum that fills the cabin when you're cruising at a steady RPM—usually right around 2,500 to 3,000. It's the kind of sound that makes it impossible to have a conversation or listen to music comfortably.
Because the VQ engine is a high-revving V6, it's prone to this. When looking for a 2007 g35 sedan exhaust, you want to look for systems that include high-quality resonators. Cheaper "straight-through" systems might sound cool in a YouTube clip, but they will likely drive you crazy on a long road trip. Brands like Motordyne use something called a "Helmholtz resonator" which is specifically designed to cancel out those annoying frequencies. It's basically science for your ears, and it's worth the extra money if you plan on daily driving the car.
Popular brands that actually fit the sedan
It's important to remember that the 2007 sedan is different from the coupe. A lot of parts are not interchangeable. When you're hunting for a 2007 g35 sedan exhaust, make sure the listing specifically mentions the V36 sedan (2007–2008).
- Invidia Gemini: This is a fan favorite. It's a true dual exhaust, meaning it has two separate pipes running all the way back. It's known for having a deep, mellow tone that isn't overly raspy. It also looks great with those burnt blue tips if that's your style.
- Stillen: Stillen has been in the Nissan/Infiniti game forever. Their cat-back system for the G35 sedan is a bit more conservative. It's perfect for the guy who wants a "grown-up" sound. It's loud when you want it to be, but very civil when you're just puttering around town.
- Motordyne Shockwave: If you have the budget, this is often considered the "holy grail." The craftsmanship is top-tier, and the sound is arguably the best you can get for the HR engine. It really brings out that exotic-sounding wail at high RPMs without the raspiness that plagues cheaper sets.
The role of High-Flow Cats and Test Pipes
If you really want to go down the rabbit hole, you can look at what's in front of the exhaust system. The catalytic converters on the 2007 G35 are a major bottleneck. Swapping them out for High-Flow Cats (HFCs) can drastically change the volume and tone of your 2007 g35 sedan exhaust.
HFCs give you more sound and better flow while still keeping the car somewhat eco-friendly (and usually keeping the Check Engine Light off). Test pipes, on the other hand, remove the cats entirely. While this is the loudest option and offers the most flow, it can make the car sound very "tinny" or "raspy." Unless you're building a dedicated track car, most people find that HFCs paired with a good cat-back system is the perfect combination.
Installation: Can you do it yourself?
One of the best things about working on a G35 is that the exhaust layout is pretty straightforward. If you have a set of jack stands, a socket set, and some patience, you can definitely swap out your 2007 g35 sedan exhaust in your driveway.
The biggest hurdle you'll face is rust. Those bolts connecting the Y-pipe to the catalytic converters are notorious for seizing up due to the heat cycles. My best advice? Spray everything with a penetrating oil (like PB Blaster or WD-40 Specialist) the night before you plan to do the work. Let it soak in. It'll save you from breaking a stud and turning a two-hour job into a two-day nightmare.
Also, don't forget the gaskets. Most new systems come with them, but if yours doesn't, buy some high-quality ones. Using old, crushed gaskets is a surefire way to end up with an exhaust leak, which sounds terrible and can mess with your car's performance.
Final thoughts on picking the right setup
At the end of the day, the "best" 2007 g35 sedan exhaust is really subjective. It depends on what you use the car for. If it's your daily driver and you take clients or kids in it, go for something resonated and subtle like the Stillen or the Invidia Gemini. If it's your weekend toy and you want everyone within a three-block radius to know you're coming, you might want to look into more aggressive setups or even adding some resonated test pipes.
Take your time and listen to as many sound clips as you can, but keep in mind that phone microphones never quite capture the true depth of the sound. The G35 is a classic for a reason, and giving it a better voice is one of the most rewarding things you can do for the driving experience. Just watch out for those low-hanging speed bumps once you've got your new shiny pipes installed!