You’ll save right away when you add a front-pipe and a downpipe to your base system over buying each of these individually. Many car fanatics love a unique sound for their ride, almost similar to a racecar. It’s no secret that the standard vehicle exhaust system won’t produce a roaring or distinguishable sound. This is where a back cat exhaust system will be favorable to any motorist. The upgraded system will give you a more enjoyable, louder ride. But this is where certain systems will do better than others, so be sure to look into which one will be right for you.

It is important to note, however, that going too large may cause a dip in performance when gases pile up and exit the system slower resulting in torque, rpm, and horsepower loss. After the emissions are channeled out from the cylinders by the exhaust manifold, they are deposited into different catalytic converters. The IE Catback Exhaust System for your Audi B9/B9.5 S4 incorporates our in-house engineered DroneTrap technology to deliver a truly aggressive exhaust note without any annoying drone or rasp. Engineered with cutting-edge design features, including mandrel-bent stainless steel, TIG welding, multi-point reinforcements, and oversized quad tips. A catback exhaust system is a type of aftermarket exhaust system that replaces the muffler and tailpipe of a vehicle. It is called a "catback" system because it starts at the catalytic converter, which is located in the middle of the...

Cat-back exhaust systems will include any pipes that run from the catalytic converter to the muffler, the muffler itself, any pipes that may run from the muffler to the exhaust tips, and the exhaust tips themselves. Some cat-back exhaust systems have a muffler delete, which means no muffler is included. This is typically found on vehicles that function primarily for off-road use