I tested pressure before fuel filter on frame, 52 lbs max. (35 first key on pump run, then 52 after 2 more runs) I don't know how it had 60 lbs on a different day. It seems to change the output pressure on its own whim. I think I'll run a couple tanks of gas thru and then replace if it continues to be unstable. - sure didn't get many miles out of that pump.