BLUEPRINT SMALL BLOCK ALLOY HEADS 220CC 64CC

SOLD PER EACH Get big power on a small budget with BluePrint Muscle Series cylinder heads! These lightweight aluminum heads bolt up to your small block Chevy and feature 220cc intake/67cc exhaust runners, 64cc combustion chambers, and 2.08" intake/1.60" exhaust valves. They're fully assembled with valve springs, retainers, locks, guideplates, studs, and seals. Intake Runner Volume (cc): 220cc Intake Port Location: Standard Intake Valves Included: Yes Intake Valve Diameter (in): 2.08 in.

CFM Port Flow Average @ 28" .100" - 76 .200" - 137 .300" - 189 .400" - 228 .500" - 254 .600" - 258 Exhaust Valves Included: Yes Port Shape: Square-Port Exhaust Port Location: Standard

CFM Port Flow Average @ 28" .100" - 112 .200" - 155 .300" - 186 .400" - 203 .500" - 208 .600" - 216 Combustion Chamber Volume (cc): 64cc Maximum Valve Lift (in): .650 in. Intake Valve Angle: 23 Degrees Exhaust Valve Angle: 23 Degrees Valve Guides Included: Yes Valve Guide Material: Manganese Bronze Valve Seats Machined: Yes Valve Seat Machine Style: 5-Angle Valve Seat Material: Chrome Nickle Valve Stem Seals Included: Yes Valve Stem Seal Style: Viton® Fluoroelastomer Valve Springs Included: Yes Spring Pressure Open:360-380 @ 1.150 Spring Pressure Closed: 115-135 @ 1.800 Outside Diameter of Outer Spring (in): 1.295 in. Damper Spring Included: Yes Number of Springs per Valve: Dual Retainers Included: Yes Retainer Material: Chromemoly Steel Locks Included: Yes Lock Style: 7 Degree Guide Plates Included: Yes Guide Plate Pushrod Size (in): 5/16 in.