79cc/99cc Cylinder Head, Ported & Milled (core required) forged Piston must be milled for

Piston must be milled for zero deck height

This is a stock size valve for the Honda GX160/200

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308" lift with 244* duration @

The stock retainer setup was designed for 3600 rpm

79cc/99cc Cylinder Head, Ported & Milled (core required) forged Piston must be milled forYou are purchasing machine work for your cylinder head which needs to be sent to us. The factory castings have rough edges from the machining process which limits the cylinder heads power potential. We port the cylinder heads to increase performance. We also mill these cylinder heads to increase compression. The added compression will improve your engines torque and overall power. See our article on performing this modification on our test engine.