Overview:

Get big power on a small budget with BluePrint Muscle Series cylinder heads! These lightweight aluminum heads bolt up to your big block Chevy and feature 358cc intake/125cc exhaust runners, 119cc combustion chambers, and 2.3" intake/1.880" exhaust valves. They're fully assembled with valve springs, retainers, locks, guide plates, studs, and seals. Manufactured part number PS8012.

• 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): 358cc
• Intake Port Location: Standard
• Intake Port Shape: Rectangular
• Intake Valves Included: Yes
• Intake Valve Diameter (in): 2.3 in.
• CFM Port Flow Average @ 28" 
• .100" – 116
• .200" – 184
• .300" – 241
• .400" – 291
• .500" – 328
• .600" - 351

Exhaust:

• Runner Volume (cc): 125cc
• Exhaust Valve Diameter (in): 1.880 in.
• Exhaust Valves Included: Yes
• CNC-Machined Exhaust Runner: No
• Port Shape: D-Shape
• Exhaust Port Location: Raised approx .300” vs OEM
• CFM Port Flow Average @ 28" 
• .100" – 84
• .200" – 130
• .300" – 183
• .400" – 226
• .500" - 260
• .600" - 286

Combustion Chamber:

• Combustion Chamber Volume (cc): 119cc
• CNC-Machined Combustion Chamber: No

Valve Specs:

• Maximum Valve Lift (in): .700 in.
• Intake Valve Angle: 24 Degrees (2 degrees rolled)
• Exhaust Valve Angle: 15 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: 380-400 @ 1.250
• Spring Pressure Closed: 135-145 @ 2.000
• Outside Diameter of Outer Spring (in): 1.540 in.
• Damper Spring Included: Yes
• Number of Springs per Valve: Dual
• Retainers Included: Yes
• Retainer Material: Chromemoly Steel
• Locks Included: Yes
• Lock Style: 10 Degree

Pushrods:

• Guide Plates Included: Yes
• Guide Plate Pushrod Size (in): 3/8 in.

Rocker Arms:

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

Misc:

• Head Style: Assembled
• Cylinder Head Material: Aluminum
• Cylinder Head Finish: Natural
• Spark Plug Style: Straight
• Cover Mounting Style: Perimeter Bolt
• Oiling Style: Through Pushrod
• Machined for O-Ring: No
• Spark Plug Style: Straight
• Valve Cover Mounting Style: Perimeter Bolt
• Heat Crossover: No
• Camshaft Style: 
• 7/16-14 in. & 3/8 -16 in. Accessory Bolt Holes Machined on Ends of Heads
• Exhaust port location raised approx. .300” vs OEM

Qty:

• Sold Individually

Warranty:

• Backed by our full 12-month limited warranty!

WARNING: Cancer and Reproductive Harm-
www.P65Warnings.ca.gov