The Shocker 370cc full CNC ported is the Big Dog in our BBC line. Its runner will feed your beast, street or strip. Flowing 440 cfm with a 2.350 valve, this head will support big cubic inches and Big power that will not break the bank and will shock your competition and ours. BBC 370cc CNC Ported (Bare Heads). 2.350"/1.880" valve sizes. 121cc-127cc chambers(Your Choice). Intake 175 242 305 395 405 427 428 435 440. Exhaust 139 190 236 265 285 300 304 307 309. LIST PRICE IS FOR BARE SET. Roller cams up to. Stainless Steel Erson Competition Series 2.350"/1.880" Valves 11/32. Erson Steel Retainers, 10° Locks, 7/16" Rocker…