BILLET FUEL CELL CAP-12-Bolt Flange Looking for an alternative to your stock fuel cell cap or maybe you need a fill cap for that custom oil tank or valve cover you are building? Well, look no further! Earls has created a full line of Billet Fuel Cell Caps and Billet Fill Caps. Earls caps are CNC machined from 6061-T6 billet aluminum and they feature a bright black anodize for great looks and corrosion protection. Each cap features a laser etched Earls logo so you know it is quality product.The Earls Billet Fuel Cell Caps are available for Jaz, Harwood, or RCI fuel cells. The EAR166017 features a 5.343 12-bolt flange. The kit has a large 3 opening with an easy to grip screw on cap that utilizes an O-ring seal. Stainless steel hardware is included for an easy installation. Features: 5.343'' 12-bolt flange Large 3'' openingEasy to grip screw on cap with o-ring seal Stainless steel hardware included Earl's Billet Fuel Cell Cap-12-Bolt Flange 166017 at low everyday prices. Be sure to check out all of our products from Earl's Performance Products including Earl's Performance Products Fuel Cell Caps.