Fuel Line Kit For 90-91 K5 Blazer Steel. Our Tank to engine Fuel Lines run from the back of the vehicle to the front. They will either connect to the fuel pump at the motor or run directly to a fuel rail. All lines come Pre-Bent and flared with the correct threaded fittings which reduces your install time tremendously. Our mild steel lines are Galphan coated for added protection. Our stainless-steel lines are T304 but are of a special softer blend to help with any possible leaks. Application Chevy-K5-Blazer Chevy-K5-Blazer-1990 Chevy-K5-Blazer-1991.