6.6L Duramax Billet Coolant Block Off Plate (2001-2025) Apparel Each set of ARP Head

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

Only active when boost over 15psi

For 05-07 Ford Powerstroke 6

Threaded holes that are cleaned and free of debris are crucial in providing accurate torque readings during your engine build or head gasket repair

5 inch (105 percent greater flow area) Stock: 2

6.6L Duramax Billet Coolant Block Off Plate (2001-2025) Apparel Each set of ARP HeadUpgrade 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