BIG BLOCK CHEVY CAST ALUMINUM CYLINDER HEADS 20X 485cc CNC

QUICK INFO >>>

Maximum competition, performance marine and high torque, 8,000+ RPM, 500+ cubic inches.

Dart developed the first successful aftermarket aluminum heads for the big block Chevy engine platform, and we’ve done it again! We have continued to refine our revolutionary designs through our in-house research and development program and now offer the latest of our advancements in the Race 20°X 485cc CNC Aluminum cylinder heads.

The Dart Race Series 20° X heads deliver superior performance, by utilizing 485cc runners in a raised asymmetrical port design, and feature a 20° rolled valve angle with redesigned shallow combustion chambers. Dart utilizes its “X” pattern lifter and rocker layout creating the industry’s most stable valvetrain. These heads are ideal for maximum effort naturally aspirated, big boost forced induction, or nitrous applications.

• Designed to use conventional BBC intake manifolds.

• Requires use of Darts exclusive X pattern T&D shaft mounted rockers.

• Requires special pistons.

• HIP (Hot Isostatic Pressed) Casting.

• Solid heads available by special order.

• MUST use Copper seats with Titanium Valves.

• Heads are sold individually.

HEAD PARTS

Dart has everything you need to assemble a cylinder head: Titanium or Stainless Steel valves, springs, locks, retainers, seals, studs, and guide plates.

See page 107.