1. ±4mm Adjustable flanges for stroker or narrower engines.
2. Twin 33mm I.D. with 50.8mm O.D. Tail Pipes.
3. 100% #304 stainless steel muffler, tail pipes and headers.
4. Build in M18x1.5 nuts for Lamda sensor when tuning carburetors.
5. Fiberglass fire sleeve on #2 and #4 header pipes were designed to protect fresh air hoses.
6. Use original 111 298 051A gasket for heater box. 111 298 051A gasket sold separately.
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