SS801NM-432112 Mel's Manufacturing 4" Down Pipe Back Exhaust - Stainless GMC/Chevy 6.6L Duramax 2001-2007

Fits 4" Exhaust Systems

This MBRP exhaust tip fits 4" exhaust systems - it has a 4" inlet, 6" outlet, and is 12" long with an angled rolled end and a polished stainless finish. No welding required.

Increase your turbo boost pressure to approximately 28-30psi with a quick 5 minute installation of PPE's boost increase valve for your 2001 - 2004 GMC Duramax LB7 truck.

When it comes time to service the re-washable air filter element on your S&B Cold Air Intake System, this kit is the best. Comes with a cleaning agent and re-oil bottle.

Mel's Manufacturing 3" T-409 Stainless Steel replacement turbo direct pipe for 2004.5-2010 GMC/Chevy Duramax 6.6L LLY, LBZ, and LMM engines.

2001-2010 GMC Chevy Duramax LB7/LLY/LBZ/LMM - BD’s Full Bore exhaust manifold restores exhaust flow balance, improves power and reduces EGT’s inside the combustion chamber. All of which is accomplished by maintaining internal bore size thus maintaining turbo drive pressure.