Brand: Dart

Dart 11511123PF Cylinder Head Aluminum Small Block Chevy Pro1 215cc 49cc 2.050″ x 1.600″ Angled Plug, Assembly w/ 1.550″ Dual Springs for Roller Lifters  Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 215cc Intake Valve: 2.050” Exhaust Valve: 1.600” Springs: 1.550″ Dual Springs for Solid Roller Cam Max Lift: .700″ Chamber Volume: 49cc

Dart 11521123P Cylinder Head Aluminum Small Block Chevy Pro1 215cc 64cc 2.050″ 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: 215cc Intake Valve: 2.050” Exhaust Valve: 1.600” Springs: 1.550″ Dual Springs for Solid Roller Cam Max Lift: .700″ Chamber Volume: 64cc

Dart 11610020P Cylinder Head Aluminum Small Block Chevy Pro1 215cc 72cc 2.050″ x 1.600″ Angled Plug, Bare Casting  Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 215cc Intake Valve: 2.050” Exhaust Valve: 1.600” Chamber Volume: 72cc Plug Types: Angled Serious street performance, modified oval track and bracket racing. Mid-range to 7,000 RPM. Best

Dart 11611122P Cylinder Head Aluminum Small Block Chevy Pro1 215cc 72cc 2.050″ 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: 215cc Intake Valve: 2.050” Exhaust Valve: 1.600” Springs: 1.437″ Dual Springs for Hydraulic Roller or Solid Flat

Dart 11620020P Cylinder Head Aluminum Small Block Chevy Pro1 215cc 72cc 2.050″ x 1.600″ Straight Plug, Bare Casting Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 215cc Intake Valve: 2.050” Exhaust Valve: 1.600” Chamber Volume: 72cc Plug Types: Straight  Serious street performance, modified oval track and bracket racing. Mid-range to 7,000 RPM. Best

Dart 11621122P Cylinder Head Aluminum Small Block Chevy Pro1 215cc 72cc 2.050″ x 1.600″ Straight Plug, Assembly w/ 1.437″ Dual Springs for Hydraulic Roller and Flat Tappet Lifters Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 215cc Intake Valve: 2.050” Exhaust Valve: 1.600” Springs: 1.437″ Dual Springs for Hydraulic Roller or Solid Flat

Dart 11621123P Cylinder Head Aluminum Small Block Chevy Pro1 215cc 72cc 2.050″ x 1.600″ Straight Plug, Assembly w/ 1.550″ for Roller Lifters Material: RMR Cast Aluminum Alloy Valve Angle: 23° (stock) Intake Port Volume: 215cc Intake Valve: 2.050” Exhaust Valve: 1.600” Springs: 1.550″ Dual Springs for Solid Roller Cam Max Lift: .700″ Chamber Volume: 72cc Plug Types: