Holley Equipped Billet Fill Cap

Holley Billet Fill Cap kits allow you to put a fill cap or inspection plug anywhere it is needed. Kit #166020ERL is a bolt on with an O-ring seal and features a 2.17" 4-bolt style flange with stainless hardware. The kits has an easy to grip screw on cap with O-ring seal and a 1.38" diameter opening.