1. TRUE equal length header, completed by CAD design and lots of dyno hours
2. Fully TIG welded, all flanges, no gas leaking.
3. #304 stainless steel muffler with #304 polished tail pips
4. #304 Stainless steel Header and Flanges
5. Fit stroker Engine with stock Rod, or 2mm(or less) under cylinder.
6. 8mm stainless steel Type 4 muffler Flanges can be match ported
7. Easy to adjust valves
8. Build in M18 nuts, for tuning when use O2 sensor
9. Pre 1960 BUS may need to modify rear apron or headers( 2 flanges include in this option).
10. Clear oil sump, like Gene Berg oil sump1.5q & 3.5q, Bugpack sump, CB, Empi.