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...
This is a direct drop-in and can be installed at home or at the shop. That’s why we carry a wide lineup of sport exhaust systems, from individual pieces to full kits, made by some of the best manufacturers in the industry. We take exhaust so seriously that we also make our own branded exhaust systems in our own facility. We use 304 stainless steel for extra durability and life, and ensure every component is forged to fit your vehicle. Cat-back exhaust systems have more efficient gas flow, yielding increased engine performance, thanks to their larger exhaust tubes and mandrel bends. As a result, your car will be able to breathe better and produce more power.
If you've got questions about cat-back exhaust systems, pipe diameters, muffler type, or anything else, talk with our product specialists. All 1995 model year vehicles, and all 1992 model year or earlier vehicles. All model year vehicles that were manufactured with EPA or Federal emissions certification. Exhaust gases from the cylinders are collected in the exhaust system to prevent harmful fumes from entering the vehicle.
Considering cat-back exhausts replace more restrictions, they typically offer increased performance and noise compared to axle-back systems