Looking to replace the factory catback system on your 2015+ Subaru WRX or WRX STI? We've compiled a list of the best and most popular catback exhaust systems to help you make a choice. Whether your car is stock, or you've gone stage 2, a catback will make your car sound great.
These catbacks can improve performance by freeing some restriction from the factory exhaust system. They also improve the sound of your car, giving a more aggressive sound, so you can really hear the engine roar. If you want something a little more substantial than an axleback exhaust system for the 2015+ WRX and STI, check these catbacks out.
Our Top Pick: Invidia Q300 Quad Tip Catback ExhaustCheck Latest Price
Invidia is one of the most popular brands in the Subaru aftermarket world for their exhaust systems. This exhaust system is made from high-quality tig welded SUS304 stainless steel, has CNC machined flanges, and is polished to a very nice finish. As expected, it includes any required hardware. The Q300 lives up to Invidia's reputation for high quality parts.
For something a bit louder than stock, but something that won't annoy the neighbors, Invidia's Q300 catback for the WRX perfect. It's made from high-quality stainless steel, and the flanges have been CNC machined. The flat bottom of mufflers keeps them from sticking out under the car, which not only looks a lot nicer, but improves aerodynamics.
We think the Invidia Q300 is the all around best catback for the WRX. Invidia's high quality is hard to beat. It's not too loud and doesn't drone, but you still get some nice sound from the car when you want it.
Invidia Q300 with Titanium Burnt TipsCheck Latest Price
If you're willing to shell out a bit more cash, then Invidia also offers the Q300 with burnt titanium tips. They have a really nice finish, and will add a subtle flair to your exhaust tips that the standard stainless steel can't compete with.
Invidia Gemini R400 Catback Exhaust SystemCheck Latest Price
Invidia's Gemini R400 is a very popular choice for 2015+ Subaru WRX/STI owners. Its large quad tips add an aggressive flair to the rear end of the car, and fit much better in spaces in the bumper than the stock system. It's also great when paired with Invidia's downpipe to make a full turbo back system.
3 inch tubing frees up some restriction from the stock catback system and deepens the exhaust note. If you're looking for something significantly louder and still want to cut out some drone, then this is the best exhaust for you.
Mishimoto Catback ExhaustCheck Latest Price
Mishimoto is well-known in the aftermarket performance scene for their high quality parts. This exhaust system lives up to the expectations. The muffler design eliminates highway drone, but still gives you an aggressive exhaust note and turbo sound when you accelerate.
The 3.5" staggered exhaust tips fit perfectly in the rear bumper's slots, giving a much nicer more finished appearance when compared to stock. This is a great catback from a great company.
Perrin Dual Tube Catback ExhaustCheck Latest Price
Perrin is an extremely popular brand in the aftermarket performance world for Subarus.
With this catback, Perrin has brought something very unique to the table. This exhaust system is designed with dual 2.25" tubes that extend all the way to the downpipe. Compared to the standard single 3" tube, this increases the volume by 12.5% for increased flow, meaning more performance gains.
The Perrin Dual Tube catback is made from quality 304 stainless steel that won't rust. It's designed to easily mount up in place of the factory system with the exhaust hangers aligned in the stock locations. This exhaust system is well made and sounds great, and for those reasons we can highly recommend it.
Invidia N1 Dual Exit Catback ExhaustCheck Latest Price
Another great offering from Invidia is the Invidia N1 Cat back exhaust system. This exhaust for the 2015+ Subaru WRX features dual exits with large tips that fill up the space in the diffuser nicely and give a more aggressive look compared to the stock catback system.
The Invidia N1 catback is made from high-quality stainless steel, mandrel-bent for maximum exhaust flow and backpressure reduction, producing strong hosrsepower and torque gains in the mid to top end. If you're looking for a dual exit system, this may be the best exhaust choice for you.
Invidia N1 with Titanium Burnt TipsCheck Latest Price
For a bit of extra cash, Invidia offers their N1 Catback with titanium burnt tips. It has a really cool rainbow-like finish that sets it apart from the stainless steel version.
Invidia N1 Titanium Tip Single Exit CatbackCheck Latest Price
Invidia's N1 exhaust for the WRX / WRX STI also is available as a single exit system. For the least restriction possible, you need to reduce the number of bends, and the Invidia N1 does just that. This means more potential performance for your tuner to unlock, and it also sounds great.
The Invidia N1 Single Exit is made from polished stainless steel, with a burnt titanium tip. The quality of this exhaust system is excellent, just as we'd expect from a company like Invidia. If you're looking for something different than the rest of the quad tip options, and something loud, this is a perfect choice.
GReddy Supreme SP ExhaustCheck Latest Price
GReddy has been around since 1977 when the company was founded in Japan. Since 1994, the GReddy Performance Parts has been developing and distributing parts out of Irvine, CA. They've long been established as a source of the highest quality aftermarket parts, as they work to further improve and provide excellent technical support.
The GReddy Supreme SP Exhaust for the 2015-2020 WRX is a great sounding catback for both the FA20DIT in the WRX and the EJ257 in the STI. It relieves most of the restriction from the factory catback system, letting the roar of the exhaust be heard, and giving some power gains. The 3.5" inch tips are polished and look great with the engraved GReddy logo.
We highly recommend this WRX exhaust system for its great sound, while keeping drone under control. It sounds louder and aggressive while you accelerate, but mellow and drone-free when cruising on the highway.
Tomei Expreme Ti Titanium Catback ExhaustCheck Latest Price
Looking to add performance to your 2015+ WRX with weight reduction and added horsepower? The Tomei Expreme Ti Titanium exhaust offers 34.84lbs of weight reduction over the stock catback system.
With its single exit design, it's been designed with minimal bends to minimize exhaust turbulence, increasing horsepower and torque, and improving throttle response.
Its exhaust hangers are welded to align with the factory positions for easy installation. This exhaust system is simple yet effective in improving your WRX's performance.
HKS Hi-Power Spec-L CatbackCheck Latest Price
The HKS Hi-Power Spec-L Catback for the 2015-2020 Subaru WRX has a dual exit design, with two large stainless steel exhaust tips. The exhaust system frees up some restriction that's present in the stock catback system with its 3" tubing, precisely bent as smoothly as possible.
This catback sounds great with both the WRX and WRX STI, offers some performance gains, and weighs half as much as the stock system. If you're looking for a great dual exit exhaust for your WRX, then we think this one's great.