I've been running a Holley red now for almost or better than five years . Its plumbed straight into the fuel line in the frame rail, with no regulator. The only problem I've had out of it was last Monday . The temp here dropped down in the negative 5-8 range. Must have gotten water in my tanks somewhere . Long story short .....got ice in the pump while driving and she shut down . It warmed up two days later , and she was running fine again