“Is this a hybrid” my friend asked jokingly as I floored it, hitting the rev limiter in my new Subaru WRX. I told myself I'd just keep the car stock, but deep down I knew I couldn't forever. We all use some sound from our cars. We want them to sound alive and angry when we really get on it. An axleback exhaust system is a more affordable way to make your car sound louder compared to full catback exhaust system, and it's easy to install with just a wrench and some ramps, and doesn't require tuning. We've reviewed some of the most popular axleback exhaust systems for the WRX and WRX STI to help you pick the right one.
Remark Muffler Delete
The stock mufflers on the 2015-2020 WRX are gigantic, bigger than my head, and there's one on each side of the car. The most obvious solution is to get rid of them, if you want your car to be louder.
The Remark Muffler Deletes have 3.5″ double-wall stainless steel tips and give the back end of the car a subtly higher-end look. Removing the mufflers entirely may sound extreme, but with the stock downpipe and midpipe left in place, these cars stay reasonably quiet until you step on it and really bring the RPMs up. This axle back overall feels very high quality, and bolts on easily in place of the stock mufflers.
If you want the most sound from your exhaust as possible, this is the way to go. Cold starts are deep and bassy, and the car will really scream when you rev it up. You'll hear pops and crackles uninhibited by any mufflers. This is how your car was meant to sound, whether you have the WRX with the new FA20DIT or the STI with the EJ257.
Nameless Muffler Delete
Although we'd recommend the Remark muffler delete first, the Nameless muffler delete is also an excellent choice that many Subaru WRX owners have decided to go with. These are similar in design to our choice, the Remark Muffler deletes, but the tips are shorter, and the exhaust hanger is more clearly visible when installed.
Nameless Axleback with 5″ Mufflers
Nameless is a top choice for Subaru axle back exhausts in terms of popularity. They offer a few variations of the axle back, either as a muffler delete or with various different sizes of mufflers.
The muffler delete is a great choice, but if you want something a little tamer, Nameless has got something for you. The 5″ mufflers are much smaller and less restrictive than the stock mufflers but will keep the volume down and help prevent drone.
ETS offers a muffler delete axle back system for the 2015+ WRX/STI. They make a burnt tip variant, as well as plain stainless steel. The burnt tips add a nice subtle flair that will be sure to make your car stand out from the crowd.
Magnaflow also makes a muffler delete for the 2015-2020 WRX and STI. It has double walled 3.5″ tips, similar in design to the other axleback options.
What is an axleback exhaust system?
An axle back exhaust system, as the name suggests, it the part of the complete exhaust system behind the rear axles. On the 2015+ Subaru WRX, the stock axleback system has a large muffler on each side of the car. An aftermarket axleback replaces this, either giving you smaller mufflers or no mufflers at all, making the car louder.
What model years are these axleback sytems for?
These exhaust systems work with all Subaru WRX and WRX STI models from 2015 and up, so that includes the 2015, 2016, 2017, 2018, 2019, and 2020 model years. The factory exhaust system for these models has been unchanged, and aftermarket systems for all of them are the same, just simple bolt on parts.