Fits Jetta VR6 and lets the machine 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.