Porting Throttle Bodies

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Welcome to Dan Vance Racing !

This is our new website & still under construction.

Please feel free to ask Dan what he can do for you.


Twin Cam/ Evolution/Shovelhead S&S Cycle & more......

Cylinder Head Porting

Harley & S&S Motors

Big Motors, Big Power

124", 120", 113 ", 107", 103", 98", 95"

Ported Throttle Body

Harley Davidson/ S&S Cycle/ HPI

43 mm to 70 mm & more.....

Machine Shop Services

CNC machining/EngineCase boring, Timken upgrade & more!

Dan Vance Racing has been providing performance options for Harley Davidson motorcycles for over 30 years.  His extensive experience in drag racing, street mods, dyno tuning, cylinder head porting, throttle body porting & building big inch motors has provided him with the know-how to customize Harley Davidson & S&S engine modifications in all RPM ranges according to the way you like to ride.