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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.
PRO1 24 325cc Port

PRO1 24° 325cc

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Description

Serious street performance, mild bracket racing, and marine. Over 7,000 RPM, 525+ cubic inches. Can be used on smaller engines with a tight converter.

The PRO1 24° 325cc delivers increased airflow at high valve lift for high RPM, big cubic inch engines, and still remains compatible with off the shelf pistons, valve train components, and intake manifolds.

Long wearing Bronze valve guides, screw-in studs, multi-angle intake seats with hardened, radiused exhaust seats are standard. Best of all, our precision cast ports produce outstanding airflow without time consuming porting.

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

Heads are sold individually.

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Material: RMR Cast Aluminum Alloy

Valve Angle: 24°

Intake Port Volume: 325cc

Intake Valve: 2.250”/2.300”

Exhaust Valve: 1.880”

Chamber Volume: 121cc

Intake Port Shape: Rectangle

Exhaust Port Location: .300” raised

PRO1 24° 325cc – Aluminum (w/ 2.250” Intake Valve)

19200010 – Bare Head

19200111 – 1.550” Single Springs for Hydraulic Flat Tappet Cam .660”

19200112 – 1.550” Dual Springs for Solid Roller .690”

19200116 – 1.625” Dual Springs for Solid Roller Cam .850”


PRO1 24° 325cc – Aluminum (w/ 2.300” Intake Valve)

19200030 – Bare Head

19200132 – 1.550” Dual Springs for Solid Roller .690”

19200136 – 1.625” Dual Springs for Solid Roller Cam .850”


PRO1 24° 325cc – Aluminum (Marine Heads w/ 2.250” Intake Valve)

19200010M – Bare Head

19200112M – 1.550” Dual Springs for Hydraulic Roller Cam .690”


PRO1 24° 325cc – Aluminum (Marine Heads w/ 2.300” Intake Valve)

19200030M – Bare Head

19200132M – 1.550” Dual Springs for Hydraulic Roller Cam .690”

PRO1 310, 325 & 345 Tech Sheet – H38

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