GM Big Block Compatible Engine Cylinder Head

BluePrint Muscle Series Aluminum Cylinder Heads

SKU: PS8012

Unleash the full potential of your Big Block Chevy with BluePrint Muscle Series Aluminum Cylinder Heads! These high-performance heads are designed for maximum power and affordability. Featuring massive 358cc intake/125cc exhaust runners, 119cc combustion chambers, and 2.3" intake/1.880" exhaust valves, these heads come fully assembled with heavy-duty components, including valve springs, retainers, locks, guide plates, studs, and seals. Designed and produced by BluePrint Engines, these heads deliver exceptional flow numbers (see specifications below) and are backed by a 12-month limited warranty. Sold individually.  

Key Features:

• Lightweight aluminum construction
• 358cc intake/125cc exhaust runners  
• 119cc combustion chambers
• 2.3" intake/1.880" exhaust valves
• Fully assembled with heavy-duty components
• 12-month limited warranty

Specifications:

• Intake: 358cc runners, rectangular port, 2.3" valves
• Exhaust: 125cc runners, D-shaped port, 1.880" valves (raised approx. .300" vs OEM)  
• Combustion Chamber: 119cc
• Valve Springs: 380-400 lbs open pressure, 135-145 lbs closed pressure  
• Max Valve Lift: .700"
• Valve Angle: 24 Degrees (Intake), 15 Degrees (Exhaust)
• Rocker Arm Studs: 7/16" x 20  
• Guide Plates: 3/8" pushrods
• Spark Plug Style: Straight