Complete Stock Dual Port Cylinder Heads assembled with 35.5 x 32mm Stainless Steel Valves, Stock Valve Springs, Steel Retainers, Hardened Keepers, Rocker, Exhaust and Intake Studs. 14mm 1/2" reach Spark Plugs. Complete with a Performance Valve Job and assembly. All EMPI Complete Heads are supplied with Stainless Steel Valves. Lash Caps P/N 4006 are required in all cylinder head applications that have Stainless Steel Valves.