.500 Open Light Weight 4500

Wilson Manifolds open spacers have become the standard in NASCAR NEXTEL Cup racing, but are for use in any application where a top quality light-weight billet spacer is desired. Open spacers increase plenum volume and move the throttle blades away from the roof of the runners, allowing the air/fuel mixture to turn more easily into the runners for improved distribution and mixture quality. Open spacers will add mid range and top end hp. This spacer is raw Aluminum. * Adds mid & top end power * Increase plenum volume * Allows the air/fuel mixture to turn more easily into the runners by moving the carburetor up away from the runner roofline * Improved distribution and mixture quality * Will add mid range and top end hp * Wilson Manifolds is the only manufacturer that offers multiple heights for 4500 carburetors