2001-2004 Duramax LB7 Aluminized 3" Turbo Down Pipe (GM8425)Remove the restrictive OEM downpipe and replace it with MBRP's GM8425 3" Downpipe. This will help your LB7 breath by increasing the exhaust flow of your turbocharger. Featuring full 16 gauge mandrel bent tubing to maximize flow, as well as an extremely durable high temperature ceramic coating, these pipes will deepen the sound of your Duramax while lowering EGT's and provide a quicker throttle response. The install process is as simple as it gets from

Brand New injector set at 30 percent over

The stock LBZ/LLY/LMM  turbocharger runs out of air at about 530rwhp

We took the pair on a 900-mile loop through city traffic

2011-2015 Duramax LML 4" Cat Back Exhaust No Muffler (431014)

The PowerHouse LS 5

transmission fluid doesn’t reach your cooler

Separate fill and drain ports

as well as additional exhaust noise and soot buildup

Simply put

Biggest injector recommended for stock CP3 pump or turbo

Heavy duty snap ring and blow-off valve to prevent runaway pressure damaging case

Nonetheless