Budget cylinder heads for a 318

For street nasty the stock heads. The large port heads will loose throttle response and hp per second when going from 1/4 throttle to 1/2 or 3/4 throttle. The big port big valve heads yeah max numbers at wide open throttle. Drag race.

Really hard to beat factory heads for street nasty. But you may give up 15-20 hp depending on the combo. But have better throttle response with factory heads.