sbc aluminum head 64cc. Good for .550 lift In valve 2.020 Ex valve 1.60 All new. Price is for once complete head 200cc intake runners Assembled in the USA Thanks for looking any questing just pm me Flow data .200 in 128. Ex 110 .300 in 193. Ex 138 .400 in 234. Ex 162 .500 in 257. Ex 189 .600 in 262. Ex 199 .700 in 263. Ex 217