Borla® (12-16) BMW 328i/428i 304SS 2.75" S-Type Cat-Back System

Cat-Back Systems™

This commonly-used term was actually originated by Borla, who pioneered the concept. "Cat" is motorhead sh"rthand for "Catalytic Converter." A Borla Cat-Back™ exhaust replaces your entire stock system from the catalytic converters "back” to the tips ex"ting the bumper. This type of system delivers the most dramatic upgrade in sound, because it includes improvements to virtually all the undercar piping, incorporating Borla’s ultra-smooth mandrel bends, X-Pipe technologies, pipe diameter specs and other characteristics that shape the sound. Borla Cat-Back™ systems are available for a wide variety of popular cars and trucks, and are offered in your choice of sound technologies — ATAK®, S-Type and Touring — each with their own distinct volume and character. 

BORLA® Cat-Back™ part# 140509 fits (N20) 2.0T engine. Does NOT fit (N26 SULEV) 2.0T engine. System features polished T-304 stainless steel tips. BORLA® Cat-Back™ & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere.

Each system is built from premium T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer-controlled CNC manufacturing ensures an accurate fit.

Best of all, BORLA® stands behind every system with a Million-Mile Warranty. Just what you‘d expect from the world‘s most experienced (and most winning) exhaust brand.