FL-1hp is a horrible choice. Bypass open at 19 psig, you would be starving the engine for
oil if an issue arised. Most are 8-9 psig. remember it is differential across the filter, my testing at 40F with fl-1a showed 2 psig at 4k rpms so 99.9999999% not an issue. You going to spend $15 on a filter get the Royal Purple not the FL-1HP