Features: 1. 143mm Diameter Quiet Super Flow muffler. 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. Fit behind rear apron from 1950 ~1977 Type 1 Beetle, Karmann Ghia 10. Clear oil sump, like Gene Berg oil sump1.5q & 3.5q, Bugpack sump, CB, Empi.