Brand: Dart

Dart 11410010P Cylinder Head Aluminum Small Block Chevy Pro1 200cc 72cc 2.020″ x 1.600″ Angled Plug, Bare Castings Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 200cc Intake Valve: 2.020” Exhaust Valve: 1.600” Chamber Volume: 72cc Plug Types: Angled Street performance, restricted oval track, and marine performance upgrade. Mid-range to 6,500 RPM. Best

Dart 11411111P Cylinder Head Aluminum Small Block Chevy Pro1 200cc 72cc 2.020″ x 1.600″ Angled Plug, Assembly w/ 1.250″ Single Springs for Hydraulic Flat Tappet Lifters Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 200cc Intake Valve: 2.020” Exhaust Valve: 1.600” Springs: 1.250″ Single Springs for Hydraulic Roller Tappet Cam Max Lift: .510″

Dart 11411112P Cylinder Head Aluminum Small Block Chevy Pro1 200cc 72cc 2.020″ x 1.600″ Angled 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: 200cc Intake Valve: 2.020” Exhaust Valve: 1.600” Springs: 1.437″ Dual Springs for Hydraulic Roller or Solid Flat

Dart 11420010P Cylinder Head Aluminum Small Block Chevy Pro1 200cc 72cc 2.020″ x 1.600″ Straight Plug, Bare Castings Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 200cc Intake Valve: 2.020” Exhaust Valve: 1.600” Chamber Volume: 72cc Plug Types: Straight Street performance, restricted oval track, and marine performance upgrade. Mid-range to 6,500 RPM. Best

Dart 11421111P Cylinder Head Aluminum Small Block Chevy Pro1 200cc 72cc 2.020″ x 1.600″ Straight Plug, Assembly w/ 1.250″ Single Springs for Hydraulic Flat Lifters  Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 200cc Intake Valve: 2.020” Exhaust Valve: 1.600” Springs: 1.250″ Single Springs for Hydraulic Flat Tappet Cam Max Lift: .510″ Chamber

Dart 11421112P Cylinder Head Aluminum Small Block Chevy Pro1 200cc 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: 200cc Intake Valve: 2.020” Exhaust Valve: 1.600” Springs: 1.437″ Dual Springs for Hydraulic Roller or Solid Flat

Dart 11421113P Cylinder Head Aluminum Small Block Chevy Pro1 200cc 72cc 2.020″ x 1.600″ Straight Plug, Assembly w/ 1.550″ Dual Springs for Roller Lifters Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 200cc Intake Valve: 2.020” Exhaust Valve: 1.600” Springs: 1.550″ Dual Springs for Solid Roller Cam Max Lift: .700″ Chamber Volume: 64cc