1. ±4mm Adjustable flanges for stroker or narrower engines.
2. Sport muffler for engine up to 125 HP.
3. SuperFlow muffler for engine up to 150HP.
4. 100% #304 stainless steel muffler, tail pipes and headers.
5. Build in M18x1.5 nuts for connecting original O2 sensor.
6. Fiberglass fire sleeve on #2 and #4 header pipes were designed to protect fresh air hoses.
7. Use original 111 298 051A gasket for heater box. 111 298 051A gasket sold separately.
8. Tail Pipe is 50mm O.D. with 35mm I.D.