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.

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SHP 23 200cc Port

SHP 23° 200cc

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Street performance, restricted oval track, and marine performance upgrade. Mid-range to 6,500 RPM. Best for 383-434 cubic inch engines.

Dart’s SHP (Special High Performance) 23° 200cc cylinder heads provide an affordable option for larger displacement street performance engines. The SHP is designed to work with most off the shelf components.

The SHP head’s precision cast ports are designed to offer excellent flow and power without the need for CNC porting. Optimized chambers increase combustion efficiency, and multi-angle intake seats and radiused exhaust seats dramatically increase performance. Manganese Bronze valve guides increase the life of the head.

Heads are sold individually.


Material: RMR Cast Aluminum Alloy

Valve Angle: 23° (stock)

Intake Port Volume: 200cc

Intake Valve: 2.020”

Exhaust Valve: 1.600”

Chamber Volume: 64 or 72cc

Plug Type: Straight

SHP 23° 200cc – Aluminum

64cc Combustion Chambers

127311 – Bare Head

127322 – 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”

72cc Combustion Chambers

127411 – Bare Head

127422 – 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”

SHP 200 Tech Sheet – H12