This one's for the 1990 - 1992 Jetta 8v and all 2.0l 16v GLIs. Done right in stainless steel 2.25" mandrel-bent tubing, you can expect easy gains of 7 or 8hp before other mods. The system fits the OEM 50mm catalytic converter outlet and mates to a stainless steel Magnaflow muffler and tail pipe. Two year warranty on tubing and resonator and lifetime warranty on muffler. Clamps and rubber hangars included.