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 Cody on
Install was extremely easy welds on all the pipes looks fantastic and the sound is absolutely incredible also the person on the website chat was very helpful
Posted by Justin Clark on
I love this catback! Sounds amazing at an idle and driving. The downside was with the installation. I fought with it, but eventually I got it. I definitely feel difference between this catback and the STI catback. The pick-up is a lot more since installing this kit. I highly recommend Nameless and their brand!
Posted by firstname.lastname@example.org on
Excellent fit and finish. Sound is amazing. It is loud and can be rough on long commutes, but who cares. It’s beautiful.
Posted by Anthony Nowak on
Exhaust sounds so nice paired with my aftermakrket downpour. It’s quite loud but was to be expected (got the muffler deletes). Install was a breeze and super happy with the craftsmanship with the welds and bends - fit was perfect!
Posted by Tre on
Love the sound!
Posted by Rich K on
Bought the catback with 4in Mufflers and 4in Tips. The wait was not that long. Comparing the sounds from the Invidia R400 to this, Nameless beats it flat out. Would recommend this to anyone looking to buy their first mod for any STI. You will not be disappointed!
This exhaust WILL BREAK NECKS. Girlfriend loves it!
I would also recommend people buy new gaskets for the exhausts as well as the hangers.
Tyler helped me out in buying the exhaust. Awesome guy, really helped me make a decision. The Customer Service is fantastic!
Posted by Darian on
Amazing exhaust note and tone with acceptable drone as a car enthusiast. If you want to know you're driving a performance capable car, you will, and so will everyone else! Far from obnoxious and tame when needed, but oh Lordy when you get on it!!!!
Install was straight forward and the fiancée and I casually got it installed using only two ramps in the garage in under two-novice hours!
Posted by Brandon S on
This made my rex sound incredible a 10 stars if I could the 5 piece design was interesting but hey it all works out but sounds amazing 100/10 hard and a real head turner when you drop gears
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