O-ring included for a leakproof seal.
BUY Mr. Gasket Oil Filler Caps HERE
Bow Tie Bolt Kit Chrome Alternators Chrome Master Cylinder Covers Chrome Plated Alternator Case Kits Chrome Plated Bow Tie Engine Dress Up Kit Chrome Plated Engine Dress Up Kit Chrome Plated Oil Pans Chrome Plated Steel Alternator Fan Pully Set Chrome Plated Steel Flywheel Covers Chrome Plated Water Necks Replacement Plastic Valve Cover Steel Valve Covers with 350 or 454 Logo Super Hi Performance Blue Hose Kit