Store +3 RSR Billet Fuel Cap 00017 $49.95 In stock Quantity: 1 Add to Bag Product Details 2.5" Weld-On Billet Aluminum Fuel Cap Comes w/ Anodized O-Ring Cap & Weld on Bung for 2.5" Fill Hole. (Non-Vented) * We usually install these directly on the tank. Save this product for later Favorite