Dart Machinery, LTD. stands behind each product we manufacture 100%. Each component undergoes a detailed manufacturing process that involves the hundreds of calculated and precision steps to ensure the finest quality possible.

Warning This product contains chemicals known to the State of California to cause cancer and reproductive harm. www.P65Warnings.ca.gov
Race Series 12.5 296cc CNC

Race Series 12.5° 296cc CNC



Maximum competition, comp/modified drag racing, circle track. Over 7,000 RPM, high compression – low dome.

Dart Race Series 12.5° 296cc CNC heads offer outstanding performance in a raised runner style casting. By reducing the valve angle, reshaping the raised intake ports and optimizing the combustion chambers, we produced a significant increase in both airflow and combustion efficiency.

It is recommended that you contact a Dart technical representative before placing an order for this item. Detailed information about your planned engine build will help to ensure that you choose the right configuration for your motor and that any special parts and considerations are taken into account.

Heads are sold individually.


Material: RMR Cast Aluminum Alloy

Valve Angle: 12.5°

Intake Port Volume: 296cc CNC

Intake Valve: 2.150”/2.180”

Exhaust Valve: 1.600”

Chamber Volume: 38cc w/Ti

Plug Type: Angle

Race Series 12.5° 296cc CNC – Aluminum

14400000C – Bare Head – No Porting

 Full Port CNC – 2.150/1.600 Valves

14472010 – Bare Head

14472111 – 1.550” Dual Springs for Solid Roller Cam .750”

Full Port CNC – 2.180/1.600 Valves

14482030 – Bare Head

14482131 – 1.550” Dual Springs for Solid Roller Cam .750”

RACE 12.5° Tech Sheet – H25