This gasket is to be used when replacing a cork-type gasket. Due to the thickness of this gasket, it should not be used with an after-market plastic valve cover such as #83501298K that attaches with tapered self-tapping bolts. This gasket is too thick to allow the self-tapping bolt correct thread contact. Direct OE replacement Jeep parts and accessories built to the original specifications by Omix-ADA. Limited five year manufacturer�s warranty.