PPE PPE 116111035 High Flow Exhaust Manifolds & Up Pipes Kit Silver (FED / 2001 CA) | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
Fits 2001-2004 6.6L Duramax V8 (LB7) · 6.6L Duramax V8 (LLY)
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Headers replace the cast exhaust manifolds with tuned tubes so each cylinder has a smoother path out. This one is the PPE 116111035 High Flow Exhaust Manifolds & Up Pipes Kit Silver (FED / 2001 CA) | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7, listed to fit the 2001-2004 Chevrolet Silverado 2500HD/3500HD with the 6.6L Duramax V8 (LB7) or 6.6L Duramax V8 (LLY). The listing describes it as stainless steel.
why this one — This is a long, hot, awkward job on a truck. Budget for a shop and for a tune afterward. Alligator Performance lists it at $1070.98, and the fitment above is what the listing itself states, not a guess.
No horsepower or torque figure published by PPE for this part on the Alligator Performance listing, read 2026-09-04. Not estimated.
No published gain figure for this part, and nothing here is a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See our affiliate disclosure.