Invidia and Exhaust ::::: Invidia Subaru WRX/STI Bellmouth Catless Downpipe w/ O2 Bungs

Invidia Bellmouth Downpipe

The Invidia Bellmouth Downpipe for the 02-07 WRX & STI is designed to maximize exhaust flow to the highest level possible. Featuring a wide-open bell at the turbo, this downpipe provides the maximum exhaust flow possible on either your stock or aftermarket turbocharger setup. This product is a simple yet effective design that will net massive power and torque gains on your Subie. Invidia now offers a 2 bung version to make tuning easier! A plug is included so you don't have to run two sensors immediately.