These fuel line kits are temperature, gas and oil resistant. They are made from reinforced synthetic Chlorinated Polyethylene rubber hose with a nylon inner braid for strength. They feature a -6 AN male inlet fitting and a 1/8″ pipe fitting with plug for a fuel pressure gauge. They will work with all double pumper carburetors, that measure 8.80″ to 9.50″, center to center.