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
PRO2 24 380cc CNC

PRO2 24° 380cc CNC

Categories: , ,


Maximum performance, bracket racing, heads up and super classes. Over 7,500 RPM, 500+ cubic inches, a great head for maximum effort comp or bracket cars.

Dart’s PRO2 24° 380cc CNC heads have been revised with larger 2.350” intake valves and a revised port design for improved airflow and a substantial horsepower increase!

These cylinder heads were designed to make competitive engine building easier and less expensive by incorporating the rugged features of our famous Race Series casting into a ready to use, professional quality competition cylinder head. Every intake port, every exhaust runner, every valve bowl, and every combustion chamber is 100% digitally CNC machined for the ultimate in consistency.

Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.

Heads are sold individually.


Material: RMR Cast Aluminum Alloy

Valve Angle: 24° 

Intake Port Volume: 380cc CNC

Intake Valve: 2.300″/2.350”

Exhaust Valve: 1.880″/1.850″

Chamber Volume: 124cc

Intake Port Shape: Rectangle

Exhaust Port Location: .500” raised

PRO2 380cc CNC HEADS w/ 2.300”/1.880” VALVES

19674030 – Bare Head

19674136 – 1.625” Dual Springs for Solid Roller Cam .850”

19674139 – 1.650 Triple Springs for Solid Roller Cam .900”

PRO2 380cc CNC HEADS w/ 2.350”/1.850” VALVES

19674080 – Bare Head

19674186 – 1.625” Dual Springs for Solid Roller Cam .850”

19674189 – 1.650 Triple Springs for Solid Roller Cam .900”

PRO2 380 Tech Sheet – H42