next take remaing section of line put an end on it tighten to back of drivers side feed line down and out toward side of truck away from exhaust and to opposite end of filter measure cut and install end. now go back and thighten all fittings from filter on up making sure to hold fittings when tightening will move when almost tight and flex line possibly causing it to loosen at a later date once done cycle key and check for leaks and adjusting regulator to 58 psi with no vacuum on regulator line. on our trucks you dont need to even hook the vacuum line up a steady 58 is what the factory setup does anyhow if your boosted like me the regulator i have has a 1:1 line psi increase so i am using mine for that hopefully all is good no leaks at this point