Home Engine Systems Fuel System Fuel Hoses Silverado 4000 Fuel Line (Series No. 337) – Type B1 (Inside Diameter 5/16”, Length 50’) Shields Silverado 4000 Fuel Line (Series No. 337) – Type B1 (Inside Diameter 5/16”, Length 50’) $132.49 Silverado 4000 Fuel Line (Series No. 337) – Type B1 (Inside Diameter 5/16”, Length 50’) quantity Add to cart