1 Subaru WRX, STI, & BRZ Aftermarket Mods & Upgrades!
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This quality material will ensure that your Cat-Back system will last through any harsh conditions. A cat back exhaust system is a form of car exhaust that includes the catalytic converter. This type of system is often used by those who want to improve their car's performance, as it can help to increase power and efficiency.

From cat-back exhaust systems, emissions compliant catalytic converters, performance mufflers to custom exhaust parts, buy the automotive part your vehicle needs. In addition to boosting your horsepower, cat-back exhausts can make a massive difference to the sound of your car, especially if you choose exhaust tips designed for acoustics. Basically, catback exhaust systems upgrade regular exhausts, improving the flow of exhaust gases and the performance of your engine with wider pipes and smoother bends.

To maintain catalyst efficiency, the air–fuel ratio must stay close to stoichiometric and not remain rich or lean for too long. All of Milltek's performance exhaust systems are manufactured from T304L stainless-steel