Nameless Catback Exhaust - 3.5" Single Wall (19-21 STI)

The 2019-2021 STi Catback from Nameless Performance follows a long line of exhaust R&D established by Nameless Performance over the previous 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 19-21 STI using the tried and true standard EJ series engine.

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. 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, the Nameless Performance 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 from Nameless Performence 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.

[ Excluded from Shipping Specials ]