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The Wehrli WCF Stage 2 4-inch intake kit for 2004.5–2005 Duramax LLY 6.6L replaces restrictive factory plastic parts with large-diameter 4" aluminum piping, an airbox, and a dry filter with pre-filter cover to increase airflow to the turbo. The kit includes a 4.8" cast aluminum turbo intake horn to improve spool and top-end flow, silicone boots, stainless t-bolt clamps, and a custom powdercoat finish. It's a bolt-on upgrade that does not require tuning.
Wehrli 04.5-2005 Duramax LLY 4in. Stage 2 Intake Kit - Illusion Blueberry
