Fits Golf GTI (or Cabrio '96-'02) and lets the beast breath deeply. With 2.5" diameter, total mass flow is enhanced over 2.25" while scavenging flow velocities are maintained. The result is both power and torque! -across a broad rpm band, too. Made from mandrel-bent aluminized tubing, this cat back exhaust features a stainless steel Magnaflow muffler and single resonator.