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Dart Machinery CNC Ported Pro-2 Aluminum Chev BB Head
Dart's CNC machined Pro-2 aluminum cylinder heads with 380cc intake ports aare just what the doctor ordered for large displacement big block Chevrolet racing engines. The pro-2 cylinder heads were designed to make competitive engine building easier and less expensive by incorporating the rugged features of our famous Race Series casting into a ready chined on precision 5-axis machining centeres, the Pro-2 head offeres awesome power and unprecedented ease of use.
Part Type: Cylinder Head
Application: Chevrolet Big Block
Cylinder Head Material: Aluminum
Bare or Assembled: Bare
Combustion Chamber Size: 124cc
CNC Machined Combustion Chambers: Yes
Intake Valve Angle: 24
Exhaust Valve Angle: 15
Intake Port Volume: 380cc
CNC Machined Intake Port: Yes
Intake Port Flow: 420cfm @ .800" Lift/ 28"
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions: 1.774" x 2.490"
Suggested Intake Gaskets: Fel-Pro 1275 or Equivalent
Exhaust Port Volume: 164cc
CNC Machined Exhaust Port: Yes
Exhaust Port Flow: 330 cfm @ .800" Lift/ 28"
Exhaust Port Location: Raised .500"
Exhaust Port Shape: Square
Exhaust Port Dimensions: 2.112" x 1.840"
Suggested Exhaust Gaskets: Fel-Pro 1412 or Equivalent
Suggested Spark Plug: .750" reach
Valve Guides: Yes
Valve Guide Spacing: Exhaust moved .045" away from Intake
Valve Stem Diameter: 11/32" (.3415")
Valve Seats: Yes
Valve Job: Multi-Angle
Intake Valve Diameter: 2.300"
Intake Valve Included: No
Exhaust Valve Diameter: 1.880"
Exhaust Valve Included: No
Suggested Valve Length: Intake: 5.475" (+.250"), Exhaust: 5.435" (stock)
Valve Spring Pockets: 1.740" O.D. (.030" deeper MAX.)
Valve Springs Included: No
Valve Spring Application: NA
Valve Springs Retainers Included: No
Valve Locks Included: No
Valve Seals Included: No
Rocker Studs Included: No
Guide Plates Included: No
Valve Cover Mounting Style: Perimeter bolt
Steam Holes Drilled: No
Heat Crossover: No
Suggested Head Bolts: ARP 135-3603
Suggested Head Studs: ARP 235-4103
Suggested Stud Girdle: Power Products 13602K, Howards Cams 90121, Jomar 1114
Head Bolt Torque with Oil: 70 ft./lbs.
Rocker Stud Torque with Oil: 45 ft./lbs.
Intake Bolt Torque with Oil: 35 ft./lbs.
Manufacturer: Dart Machinery
Manufacturer's Part Number: 19674030
Weight: 36.5 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each
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