Dart 11221112P Cylinder Head Aluminum Small Block Chevy Pro1 180cc 72cc 2.020″ x 1.600″ Straight Plug, Assembly w/ 1.437″ Dual Springs for Hydraulic Roller or Flat Tappet Lifters

Dart 11221112P Cylinder Head Aluminum Small Block Chevy Pro1 180cc 72cc 2.020″ x 1.600″ Straight Plug, Assembly w/ 1.437″ Dual Springs for Hydraulic Roller or Flat Tappet Lifters

Material: RMR Cast Aluminum Alloy

Valve Angle: 23° (stock)

Intake Port Volume: 180cc

Intake Valve: 2.020”

Exhaust Valve: 1.600”

Springs: 1.437″ Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam Max Lift: .650″

Chamber Volume: 72cc

Plug Types: Straight 

Excellent street, strip, oval track, truck or marine performance upgrade. Maximum torque and throttle response from idle to 6,000 RPM. Best for 327-400 cubic inch engines. Works with most standard components.

Dart’s PRO1 23° 180cc Platinum series Head utilize wet flow technology. Independent tests have demonstrated an average 25 horsepower gain over the original trend setting PRO1 design.

These 180cc as cast Head out perform many larger Head in a wide range of applications. Long wearing Bronze valve guides, screw-in studs, multi-angle intake seats and hardened, radiused exhaust seats are standard.

Assemblies include Stainless Steel valves, premium springs, locks, retainers, studs, guide plates and seals.

Heads are sold individually.