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The Exergy 550 Alpha Stroker CP3 pump for 2004.5–2005 Chevrolet Duramax 6.6L LLY applications is an upgraded CP3 unit based on LBZ architecture. Designed to increase fuel delivery for modified Duramax systems, the 550 Alpha stroker pump replaces the factory unit to support higher-flow injectors and tuning. Verify vehicle model, engine variant, and fuel-system compatibility before ordering to ensure correct fitment.
Exergy 04.5-05 Chevrolet Duramax 6.6L LLY 550 Alpha Stroker CP3 Pump (LBZ Based)
