View our Specials! Coupon Code: SaveIn2026
Looking for aftermarket parts to modify or upgrade your 1981 GMC G3500 with valve seals? At Tunersports.com we carry a huge selection of the top name brand performance valve seal parts and accessories.
 IN STOCK - DROPSHIPS 501-16Fits: 11/32" Valve Stems / OE-Size Valve Guides (.400" Outer Diameter). Valves Seals keep unwanted oil from entering the combustion chamber through clearance in the valve guides. Use standard o-ring Seal retainer and oil splash shield. Requires no machining.... COMP Cams Valve Seals 11/32in O Ring 1980-1996 GMC G3500 Magnavan / Rally / Rally Camper Special / Rally STX / Vandura / Vandura Special 1981-1988 GMC G3500 Rally Custom $34.74 |