Description
The Gulp Factor
Your engine is a glutton for air. It will take over 200 "gulps" per second, at velocities over 500 MPG – if your intake valve will let it.
The RAD Valve's seamless, one-piece, precision casting and continuous aeroform surfaces ensure maximum flow velocities and instant, explosive movement of air particles the moment you turn the throttle.
Result: An intake valve the size of your fist delivers air with the power of a tornado.

![RAD VALVE KX500 1987-04 Boyesen []](https://boydsassets.specd.nz/uploads/2026/09/553006d7-fdbe-40bb-a85d-905181fceca1-jpg.webp)




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