525 Valve Cover Breathers ( SOLD AS A SET )(NOTE: This is one front and one back) What is a Velocity stack

What is a Velocity stack

Our vent tubes allow you to increase your float levels

but front to back

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

525 Valve Cover Breathers ( SOLD AS A SET )(NOTE: This is one front and one back) What is a Velocity stackThe 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