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These Moroso aluminum valve covers are a pair for GM big-block Chevy (BBC) engines, 3.875 inches tall and provisioned with a -12AN breather fitting. Offered as matched left and right covers, they provide increased clearance and attach to standard BBC valve cover locations while accommodating a -12AN breather for crankcase ventilation plumbing on compatible setups.
Moroso GM BBC -12AN Breather 3.875in Tall Aluminum Valve Cover - Pair
