Moal Compe***ion Fuel Cap Straight off the dirt tracks! The compe***ion fuel caps bring back style from track roadsters of yesterday. Made of cast aluminum with steel linkage arms and aircraft clevis pins. Caps measure 5-1/2" in diameter at the base with a 3-1/4" opening. Buna-N rubber o-ring keeps the fuel where it belongs, in your tank! Caps come ***embled ready for polishing and plating, or install as is for that race ready look! Normally $599 $475 +shipping