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The Wehrli Stage 2 4" intake kit for 2017–2019 Duramax L5P replaces restrictive factory parts with fabricated aluminum 4" piping and an enclosed air box with dry filter and pre-filter, drawing cold air through the hood ram duct and inner fender for lower intake temps and higher flow. Includes a 3.5" intake horn; Wehrli recorded a 25HP gain with that horn when used with a Max Effort Tune. Hardware includes silicone boot, stainless t-bolt clamps and removable lid for service.
Wehrli 17-19 Duramax L5P 4in. Stage 2 Intake Kit - Bengal Red
