602/604 Valve Cover Breathers ( SOLD AS INDIVIDUAL ) The UFO stack allows you

The UFO stack allows you to have all the benefits of our original stack

Our 604 carb spacer is specifically designed to work with the 604 intake

no more crankcase pressure

or bubbly underwater sound

For use with a 3" 4" or 5" filter

602/604 Valve Cover Breathers ( SOLD AS INDIVIDUAL ) The UFO stack allows youThe common misconception about valve cover breathers, is the filter media used in your most common breathers is for filtering air into the engine. This is false. The motor experiences constant blow by, therefore, constant pressure is being emitted from the crank case. As your "filter" clogs up with oil & dirt during racing conditions, the rate at which the engine can relieve the constant pressure slows down. Increased crank case pressure puts pressure