Cast Aluminum Cylinder HeadSmall Block Chevy 350 w/Hydraulic Roller CamAssembled Head64cc Combustion Chamber205cc Intake RunnerAngle PlugIncludes Valves & SpringsSet of 2 Special Note: Camshaft and Lifters Not IncludedIntake Runner: 205ccCombustion Chamber Volume: 64ccIntake Valve: 2.020"Exhaust Valve: 1.600"Max Lift: .580"Coil Bind: .750"Intake Install: 145 lbs @ 1.9Exhaust Install: 145 lbs @ 1.9Closed Seat Pressure: 145 lbsOpen Seat Pressure: 360 lbsEmissions Note:This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART