2 sets of dominion heads. ARP studs and nuts. O-ringed finished set. Wires included. No need to lift these valves past 0.300. 2- 1.72 in. 2 - 1.40 ex. Over 100 cfm @ 0.050 lift. 1206 fel-pro intake. Do your research. 17 head bolt Chevy are indestructible.