B20B4 on 8psi = 258whp! 8.41 1/8 mile times and is still a running engine. i swapped for an ls vtec for higher boost. they have thin cylinder walls so for lower compression and reliability with boost use a b20b4. if going na b20z for the higher compression. also since there not that high get some arp rod bolts for the added force of the heavier 84mm pistons and be sure to notch the intake valve pockets if using vtec head. i have a b20 b4 with a small crack in #1 sleeve still runs great on 8psi when i pulled out, but with 4 new pistons already notched and arp rod bolts cheap.if you need any parts pm me.