Question: what is the difference between a cat back and a turbo back exhaust system?
Answer: Whats the difference between a Cat Back and a Turbo Back exhaust? Cat back is the exaust section behind the catalytic converter. Turbo back replaces the section of exhaust between the turbo and cat with either no cat or a high flow cat. A turbo back will typically have a "bell mouth" housing that bolts to the turbo.