BD Diesel BD Diesel 1041459 Exhaust Manifold Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fits 2001-2016 6.6L Duramax V8 (LB7) · 6.6L Duramax V8 (LLY) · 6.6L Duramax V8 (LBZ) · 6.6L Duramax V8 (LMM) · 6.6L Duramax V8 (LML)
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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 BD Diesel 1041459 Exhaust Manifold Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax, listed to fit the 2001-2016 Chevrolet Silverado 2500HD/3500HD. The listing describes it as direct fit.
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 $535.95, and the fitment above is what the listing itself states, not a guess.
No horsepower or torque figure published by BD Diesel 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.