Rudy's Performance Parts. This coolant block-off plate eliminates the common leaking issue in your 2001-2017 GM 6.6L Duramax. The factory coolant block-off plate has a cast design with a gasket. 2011-2017 GMC Sierra 2500HD/3500HD 6.6L Duramax.
Pacific Performance 119000820 01-20 GM 6.6L Duramax Coolant BlockOff Plate Black
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