The 2015-2018 WRX & STi Catback from Nameless Performance follows a long line of exhaust R&D established by Nameless Performance over the last four years. Following closely in the footsteps of the '11-'14 WRX/STi Sedan Catback, with a number of improvements and changes to fit perfectly on your '15 WRX with the DIT engine or your '15 STi using the tried and true standard EJ series engine. In testing on the EJ series engine, this catback has shown midrange gains of +32ft lb of torque and +22hp at the wheels above and beyond a standard off-the-shelf Stage 1 tune. That standard is achieved through a number of innovative design cues that have made Nameless Performance the top name in Subaru aftermarket exhaust development and engineering.
The main functional elements of this catback exhaust are its matched flow dynamic from the 3" diameter resonated main circuit into the 2" diameter secondary circuits (the dual circuits of the rear of the exhaust). Starting from a goal of matching the flow of exhaust through the 3" section and into the 2" sections, the division of exhaust is accomplished with a larger diameter 2.25" Y section in the midpipe, which takes the position of highest friction in the catback exhaust and ensures a proper division of exhaust gas flow without inducing restriction. Many other companies go oversized on the rear circuits to accomplish this goal of keeping flow up in a divided exhaust, however, the overall midrange torque suffers and the horsepower is no higher than a system with a smaller terminal circuit diameter. Our system on the other hand, produces more torque through the midrange than most exhausts on the market, while retaining higher than average horsepower gains. The result is a catback exhaust that makes a substantial difference in the behavior of the vehicle.
The second major advantage to the 2" dual rear circuits on the exhaust is a substantial decrease in low frequency cabin noise at cruise, often referred to as 'exhaust drone.' While larger rear circuit exhausts produce low frequency tones at lower flow dynamics, resulting in a boomy sound at cruise and an overly loud raspy sound at wide open throttle, our system produces a substantial reduction in cabin resonance while retaining an aggressive tone at wide open throttle.
The system is designed using 100% T304 (low corrosion, high strength) stainless steel throughout. From the flanges to the tubing and hangers to the perforated tubing in the mufflers, all of the stainless we use is the highest grade T304. Muffler packing consists of medium density, high temperature resistant ceramic wool, ensuring long muffler life and a compact lightweight design that muffles better than many market standard mufflers that are 3-4x the size of our in-house fabricated and engineered mufflers.
All weld joints are hand TIG welded by skilled craftsmen in our shop in the Pacific Northwest. With over 40 years of experience in the welding industry, our team is comprised of fabricators who have worked in every industry from automotive to heavy industrial fabrication. They pride themselves on their work and produce results that are unparalleled in the industry. Each of the connections in the catback are attached with latch over v-band clamp assemblies where they are not connected at factory connection points. At the front, a conical flare joint with a floating flange and a proprietary 3" donut gasket connect the catback directly to a factory downpipe or an aftermarket downpipe with a connection that gives all of the compliance of the factory system and allows easy adjustment during installation. At the rear of the midpipe, factory fit flanges are used with a larger diameter bore than the factory system that can still use factory gaskets (which are larger than the factory exhaust system). Factory OEM Subaru gaskets and all hardware are included with the kit.
Our urethane bushings hold your exhaust in place better that the factory rubber bushings and are highly recommended if you race your car or enjoy spirited driving. During hard cornering the exhaust "wags" left to right which sometimes causes the tips to touch the bumper. When this happens there is a chance your bumper can be damaged. The best way to avoid this is to use our urethane exhaust bushings to hold the exhaust in place.
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Posted by Tommy on
Speechless. Exhaust sounds amazing. Don’t go to YouTube just buy the exhaust . I got the cat back muffler delete 3.5 inch tips.
Posted by Shawn Segura on
I ordered the catback with muffler deletes 4in tips and I absolutely love it! I thought it was going to be too loud with the muffler deletes on my 2018 sti but it’s perfect. It’s deff loud but in a good way. It unleashed the rumble.
Posted by Mr. Sass on
Muffler delete, 4in tips. Out of all the catbacks for the fa20dit wrx this is the loudest option possible. I would HIGHLY reccomend this exhaust. With the deletes I was assuming the car would be raspy and high pitch but quite the opposite. Car sounds like a Subaru now. 5/5 worth it.
Posted by skip swavey on
My installer told me that it was a quality system and went together nicely. Sound is so much better, even with the muffler delete, it is not to loud, nor is there any drone. Love it!!
Posted by Andrew Rogers on
Bought this for my 2018 STi Type RA and I couldn't be happier with it! Sounds a million times better than stock and better than any other (equally modded that is) exhaust I've come across yet. I can't say enough about NAmeless and thier quality of product.
Posted by Donovan Theseira on
I loved my 17 WRX, but the sound was just something I knew needed to be changed. The 4 inch mufflers just make it sooo much beater, so much meatier, and I felt a knew wave of love for my car flow through me as I started it up for the first time.
Posted by Emerson Agresta on
I couldn’t have asked for a better exhaust system. Super easy to install I did have to adjust the midpipe as it was banging up against the heat shield but nothing I couldn’t take care of. Sounds amazing looks superb. I would definitely recommend this product without a doubt. I would tell anyone that’s getting this system to get the 4” tips as they look the best and to go ahead and order with the muffler deletes you can’t go wrong with these options.
Posted by Jaime Rodriguez on
Was satisfied with the whole process. From support during ordering and install. The sounds is absolutely perfect. I couldn't be more pleased with the product!!
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All prices are in USD