− Decrease quantity for Valve Cover Gaskets, Composite/Rubber Seal, 0.250 in. Thick, Oldsmobile, 6.6L, 7.0L, 7.5L, Pair Quantity + Increase quantity for Valve Cover Gaskets, Composite/Rubber Seal, 0.250 in. Thick, Oldsmobile, 6.6L, 7.0L, 7.5L, Pair Add to cart