PPE Ported Fuel Rail Fitting for 2004.5 - 2010 Duramax LB7 LBZ LMM 113071000 PPE Pacific Performance Engineering Brand (NOT Generic). Stainless Steel, CNC Machined construction for unsurpassed fit and finish. Fits 2004.5 - 2010 Chevrolet Silverado 2500/3500 Duramax and 2004.5 - 2010 GMC Sierra 2500/3500 Duramax Diesel Reduces fuel pressure drops that are caused by the restriction of the stock fuel rail fitting