7/16" serrated throttle stop. This throttle stop fits Buzzard and late model Bird catcher injectors as well as most carbon fiber injectors that use the 7/16" serrated shaft. With these throttle stops it makes it easy to set your idle and have a butterfly stop.
Throttle stop includes stainless hardware and thumb wheel to adjust idle. Billet stop is black anodized and made from heat treated billet alum.