DieselTechMike
Member
I ran a 2.5” straight pipe back to the bumper on my ALH Jetta. My current duramax suburban has a 4” straight pipe from the turbo back. The duramax has a compound set up with dual VGT turbos, ceramic coated manifolds and both turbos have turbo blankets. It sounds mean, and spools up very fast! The Jetta sounded like a baby cummins