DART 19100112MMR Pro1 Chevrolet Big Block Head – 310.00 CC Port, 121.00 CC Chamber

For street performance and mild bracket racing. Under 7,000 RPM, under 500 cubic inches. Excellent midrange torque and power, good for heavier vehicles. Inspired by Dart’s championship winning Pro Stock designs, the PRO1’s race proven features include rolled valve angles, improved spark plug location, extra long intake valves, raised exhaust ports, and fast burn chambers yet the PRO1 310cc can be used with off the shelf pistons, valve train components, and intake manifolds. Long wearing Bronze valve guides, screw-in studs, multi-angle intake seats with hardened, radiused exhaust seats are standard. Best of all, our precision cast ports produce outstanding airflow without time consuming porting. Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.
Heads are sold individually

• Industry: Automotive
• CNC Ported: Yes
• Combustion Chamber Volume: 121.00 CC
• Exhaust Valve Diameter: 1.880 IN
• Intake Valve Diameter: 2.250 IN
• Material: RMR Cast Aluminum Alloy
• Port Volume: 310.00 CC
• Valve Angle: 24 DD
• Valve Spring Diameter: 1.550 IN
• Valve Spring Maximum Lift: 0.700 IN
• Engine Type: ICE
• Product Type: Engine Cylinder Head
• Make - Web: Chevrolet
• Engine - Web: Big Block
• Emissions Code: 3