DART 18575070 Big Chief Chevrolet Big Block Head – 555.00 CC Port, 56.00 CC Chamber

Maximum Top Sportsman, Top Dragster, Pro Mod and Pro Street competition. Excellent with alcohol and nitrous, over 7,000 RPM, over 500 cubic inches. An updated Dart Big Chief 385 program incorporates a 2.500 in. intake valve for a dramatic increase in air flow. Big Chief heads have dominated in Sportsman classes since their introduction, and we have continued to improve the design with the latest Pro Stock technology. With our sophisticated CNC machining programs, we can tailor a pair of Big Chief 14 Deg CNC heads to fit your exact engine combination. Copper seats are standard and assemblies come with Titanium valves.
Heads are sold individually

• Industry: Automotive
• CNC Ported: Yes
• Combustion Chamber Volume: 56.00 CC
• Exhaust Valve Diameter: 1.850 IN
• Intake Valve Diameter: 2.500 IN
• Material: RMR Cast Aluminum Alloy
• Port Volume: 555.00 CC
• Valve Angle: 11 DD
• Engine Type: ICE
• Valve Spring Type: Bare
• Product Type: Engine Cylinder Head
• Make - Web: Chevrolet
• Engine - Web: Big Block
• Emissions Code: 3