1. ±4mm Adjustable flanges for stroker or narrower engines.

2. SS143 Super Sport muffler for engine with 38mm #2 and #4 Header.

3. Option of 43mm heater boxes SS143 Super Sport muffler for engine with 43mm #2 and #4 C pipeHeaders.

4. 100% #304 stainless steel muffler, tail pipes and headers.

5. Build in M18x1.5 nuts for Lamda sensor when tuning carburetors.

6. Fiberglass fire sleeve on #2 and #4 header pipes were designed to protect fresh air hoses.

7. Require shorten the original heater boxes 13mm, Flange adaptors included.

Options:

1. Factory Type 181 style heat riser. #2 cylinder positive pressure side. #4 cylinder negative pressure side.