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, guide plates, studs, and seals. Manufacturer's part number -HP8103.

• Maximum Output for Less Money!
• Designed and Produced by BluePrint Engines
• Fully Assembled with Heavy Duty Components
• Backed by Our Full 12-Month Limited Warranty

Intake:

• Intake Runner Volume (cc): 220cc
• Intake Port Location: Standard
• Intake Port Shape: Rectangular
• 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:

• Runner Volume (cc): 65cc
• Exhaust Valve Diameter (in): 1.600 in.
• Exhaust Valves Included: Yes
• Port Shape: Square
• Exhaust Port Location: Raised .500 in.
• CFM Port Flow Average @ 28" 
• .100" – 112
• .200" – 155
• .300" – 186
• .400" – 203
• .500" – 208
• .600" - 216

Combustion Chamber:

• Combustion Chamber Volume (cc): 64cc
• CNC-Machined Combustion Chamber: No

Valve Specs:

• 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

Springs:

• 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: Chromoly Steel
• Locks Included: Yes
• Lock Style: 7 Degree

Pushrods:

• Guide Plates Included: Yes
• Guide Plate Pushrod Size (in): 5/16 in.

Rocker Arms:

• Rocker Arm Studs Included: Yes
• Rocker Arm Stud Size (in): 7/16 in. x 20
• Rocker Arms Included: N/A
• Rocker Arm Nuts Included: No

Misc:

• Head Style: Assembled
• Cylinder Head Material: Aluminum
• Cylinder Head Finish: Natural
• Spark Plug Style: Straight – .750 Reach Gasket
• Spark Plug Placement: Vortec
• Camshaft Style: Hydraulic Roller
• Accessory Bolt Holes Drilled: Yes
• Valve Cover Mounting Style: Perimeter & Center Bolt
• Steam Holes Drilled: No
• Oiling Style: Through Pushrod
• Machined for O-Ring: No
• Heat Crossover: No
• 3/8 -16 in. Accessory Bolt Holes Machined on Ends of Heads

Qty:

• Sold Individually

Warranty:

• Backed by our full 12-month limited warranty!