A good pump from what i hear, i am putting one in to gaurantee enough oil flow for loose clearance lifters and oil thru pushrods. Most race setups won't need it, and if it pulls a lot more volume than a melling hi volume, i wonder about cavitation if used with a stock 3/8 factory pickup. It also requires the. Milodon longer oul pump drive, 23 for rollercams, 03 for cast cams.