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Catback Exhaust - 2015-2018 WRX/STi

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Nameless Performance
84 product reviews
RRP: $968.00
$948.00 (You save $20.00)
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 Product Description

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.

Features:
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.

Materials:
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.

Construction:
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.

Options:

Mufflers:

  • Muffler Delete: The loudest option. Removes the mufflers entirely. This is a 10 on a scale where stock = 0
  • 4" Mufflers: Similar to the deletes, but with the edge taken off. This is a 7 on a scale where stock = 0
  • 5" Mufflers: Our most quiet option. Perfect for those looking for a subtle upgrade. This is a 5 on a scale where stock = 0

Tips:

  • 3" Quad Staggered Double Wall: These are T304 stainless, double wall polished tips that fit perfectly into the cutout in the rear valence of the vehicle. 10 Degree Angle Cut with staggered arrangement (inboard tips stick out 1/2" further than outboard tips). 3″ diameter per tip, very close to an OEM look
  • 3" Neochrome Quad Staggered Double Wall: These blue flame/burnt tips fit perfectly into the cutout in the rear valence of the vehicle. 3" tip with a 10 Degree Angle Cut with staggered arrangement (inboard tips stick out 1/2″ further than outboard tips). These tips are only available with the Muffler Delete.
  • 3.5" Quad Staggered Single Wall: Single Wall Quad Tips in 3.5" diameter w/ 20 degree angle cut with a 1/2" staggered arrangement.
  • 3.5" Quad Non-Staggered Single Wall: Same as above but non-staggered.
  • 4" Quad Staggered Double Wall: Double wall 4" diameter quad tips, 1/2" staggered arrangement, 10 degree slash cut.
  • 3.5" Quad Staggered Double Wall: Double Wall 3.5" diameter quad tips, 1/2" staggered arrangement, straight cut, brushed finish.

Installation Instructions:

Installation Guide - Axleback/Catback/Midpipe

Recommended Add-Ons:

Urethane Exhaust Hanger Bushings

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.

  • 2 Bushings: Replace the two bushings at the rear of the car closest to the bumper. Recommend for those who either drive hard on the street or race occasionally at the track.

  • 4 Bushings: Replace all 4 rubber bushings on the axleback portion of the exhaust. Recommended for people who race their cars often.

  • 5 Bushings: Replace all 5 of the factory rubber bushings on a Catback from the midpipe back. Recommended for those who are hard core autocrossers or circuit racers.

 Product Reviews

Showing reviews 1-8 of 84 | Next

  1. Amazing sounding catback heard for the WRX!

    Posted by 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!


  2. Loud and throaty

    Posted by on

    Excellent fit and finish. Sound is amazing. It is loud and can be rough on long commutes, but who cares. It’s beautiful.


  3. Awesome - quality welds and materials used

    Posted by 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!


  4. Exhaust

    Posted by on

    Love the sound!


  5. 4in Mufflers and 4in Tips making the best sounds

    Posted by 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!


  6. Gorgeous look and note!

    Posted by 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!


  7. Full catback 3.5 staggered wall f*ckin lit

    Posted by 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


  8. NAMELESS CATBACK 4in Mufflers, 4in Tips

    Posted by on

    I will start this review by reiterating a line from a previous review. "Good things come to those who wait" This couldn't be more true. I waited about 6 weeks to get my exhaust but when I received it, I was very pleased. The costumer service was fantastic and every time I went to the website, I almost always had a rep ready to answer any questions I had. When I received the package, there were no issues and everything was wrapped perfectly with everything I ordered. The installment was easy and the quality is priceless. My STI sounds amazing and I am so glad I decided to go with Nameless. I will definitely be recommending Nameless Performance to others.


Showing reviews 1-8 of 84 | Next

 Product Videos

2015 Subaru WRX with Nameless Performance Catback Exhaust
  • 2015 Subaru WRX with Nameless Performance Catback Exhaust
    Resonator in mid-pipe with 5" short mufflers. 3" piping with 4...

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