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
RaceSeries 16 268cc CNC Port

Race Series 16° 268cc CNC



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

Dart Race Series 16° 268cc CNC small block heads deliver awesome performance, and work great with nitrous. The shallow valve angle, reshaped and raised intake ports and optimized combustion chambers produce 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.

Dual exhaust bolt pattern to fit a variety of headers.


Material: RMR Cast Aluminum Alloy

Valve Angle: 16°

Intake Port Volume: 268cc CNC

Intake Valve: 2.150”/2.180”

Exhaust Valve: 1.600”/1.625”

Chamber Volume: 47cc w/Ti 51cc w/SS

Plug Type: Angle

Race Series 16° 268cc CNC – Aluminum

14200000C – Bare Head – No Porting

Full Port CNC – 2.150/1.600 Valves

14272010 – Bare Head – Full Port

14272111 – 1.550” Dual Springs for Solid Roller Cam .750”

Full Port CNC – 2.150/1.625 Valves

14272020 – Bare Head – Full Port

14272121 – 1.550” Dual Springs for Solid Roller Cam .750”

Full Port CNC – 2.180/1.600 Valves

14272030 – Bare Head – Full Port

14272131 – 1.550” Dual Springs for Solid Roller Cam .750”

Full Port CNC – 2.180/1.625 Valves

14272040 – Bare Head – Full Port

14272141 – 1.550” Dual Springs for Solid Roller Cam .750”

RACE 16º Tech Sheet – H23