The Dart Big Block Chevy Pro 1 Aluminum Heads were inspired by Dart's championship-winning Pro Stock designs and available with 310, 325, 345, or 355cc oval or rectangular port intake runners, big block Pro 1 aluminum cylinder heads deliver out-of-the-box airflow that smokes the competition! Specifically engineered for street performance, bracket racing and Super Eliminator engines yet can be used with off-the-shelf pistons, valve train components and intake manifolds! Sold as pair.
Race-Proven Pro 1 Features:
Part Type: Cylinder Heads
Product Line: Dart Pro 1 Aluminum Cylinder Heads
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 121
CNC-Machined Combustion Chamber: No
Intake Runner Volume (cc): 345cc
Exhaust Runner Volume (cc): 129cc
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Combustion Chamber Style: Heart
Intake Port Shape: Rectangular
Intake Port Location: Standard
Exhaust Port Shape: Round
Exhaust Port Location: Raised
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.300 in.
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.880 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.790 in.
Outside Diameter of Outer Spring (in): 1.625 in.
Damper Spring Included: No
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Titanium
Locks Included: Yes
Lock Style: 10 degree
Valve Stem Seals Included: Yes
Valve Stem Seal Style: Positive stop
Rocker Arm Studs Included: Yes
Rocker Arm Nut Thread Size:7/16-20 in.
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: Yes
Guideplate Pushrod Size: 3/8 in.
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 24
Exhaust Valve Angle: 15
Valve Guides Included: Yes
Valve Guide Material: Manganese bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 4-angle intake/3-angle exhaust
Valve Seat Material: Ductile iron
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Call 316-775-7771 to purchase.
WARNING: This product contains a chemical known to the State of California to cause cancer and reproductive harm. See https://www.p65warnings.ca.gov/ for details.
