6.6L Duramax Billet Coolant Block Off Plate (2001-2025) Apparel Only active when boost over

Only active when boost over 15psi

Not stopping there we have engineered the dampener for a better balancing by TALLER COVER riveting it in place

The integrated mounting points have been strengthened for added longevity

Each set of ARP Head Studs is manufactured from ARP's proprietary ARP 2000 material in their California manufacturing facility

S372 SXE Billet 500-750 horsepower (Hot street/ racing)

6.6L Duramax Billet Coolant Block Off Plate (2001-2025) Apparel Only active when boost overUpgrade your rear engine cover and stop the coolant leaks for good! The fleece performance blocking plate is thicker than the stock plate and has an integral square cut O ring with no gasket required. OE covers are prone to leakage over time, our billet coolant block off plate with an integral O ring is an upgrade for your rear engine cover and will the stop the coolant leaks for good. Direct Replacement for GM P N: 97941204 and 12698239