What is an axle-back / cat-back / header-back / turbo-back?
These terms refer to the section of the exhaust that the new system replaces. The “-back” suffix refers to the piping from that section and back (ie. a cat-back system is from the catalytic converter and back). An axle-back usually refers to only the rear section (right after the axle, rear beam suspension, etc). Generally it would just be the last bolt-on section with the rear muffler. A cat-back (also called CBE Cat-back Exhaust) system replaces all the piping that bolts after the catalytic converter, and includes an axle-back section. A header-back exhaust connects to the exhaust header or manifold, and generally includes a pipe to delete the catalytic converter (sometimes called test pipe or cat-delete pipe) with a cat-back system. Some header-back exhausts are race systems designed for off-road use, which remove emissions equipment for maximum horsepower and torque power gains. A turbo-back (also called TBE Turbo-back Exhaust) system replaces all the piping connected to the turbo
