Lachute Performance Catback - 2011-2021 WRX & 2011 -2021 STI Grandeur de la flange:3" it is a true 3

it is a true 3 inch catback all the way through

the better it seals)

and are designed to provide an increase in horsepower

This iconic car has definitely marked the history of Lachute Performance

Lachute Performance Catback - 2011-2021 WRX & 2011 -2021 STI Grandeur de la flange:3" it is a true 3Completely assembled by hand and built from 304 stainless steel to provide a quality finish and a precise fitment. Equipped with a 1 2 inch thick inlet flange for reduced distortion and a flex pipe to allow for movement, it is a true 3 inch catback all the way through. The inlet flange will also virtually fit any available J Pipe downpipe. A flex section was added to minimize vibrations and stress. Weve built this catback with multiple v band flanges