PRO1 24° 355cc CNC
Maximum performance, bracket racing, heads up and super classes. Over 7,500 RPM, 540+ cubic inches, a great head for maximum effort comp or bracket cars.
The PRO1 24° 355cc CNC heads are for uncompromising performance and racing applications which favor high RPM power over low end flexibility. Best for big cubic inch, high RPM use.
Every intake port, exhaust runner, valve bowl, and every combustion chamber is 100% CNC machined on special dedicated PRO1 castings. Our 5-axis, computer controlled machining centers produce compound curves and complex shapes that no human could duplicate with a hand grinder.
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: 355cc CNC
Intake Valve: 2.300”
Exhaust Valve: 1.880”
Chamber Volume: 121cc
Intake Port Shape: Rectangle
Exhaust Port Location: .300” raised
Dart Marine PRO1 cylinder heads
Features an exclusive chromate surface finish to inhibit corrosion and extend the life of the head.
Fitted with Inconel exhaust valves to withstand the extended running time and temperatures typical of marine usage.
PRO1 24° 355cc CNC – Aluminum
19574030 – Bare Head
19574136 – 1.625” Dual Springs for Solid Roller .850”
19574139 – 1.650” Triple Springs for Solid Roller Cam .900”
PRO1 24° 355cc CNC – Aluminum (Marine Heads)
19574030M – Bare Head
19574136M – 1.625” Dual Springs for Solid Roller .850”