Yes I know, it's called an "enrichener" when it's on an S&S carb. Whatever you want to call it, I call it the perfect match to the Spitfire Brass or Chrome Breather Bolts. There's nothing better than a one bolt accessory that can change the look of the whole bike. This little guy is CNC machined from USA made brass right here at our shop. The conture fits your finger tips perfectly, and when it's in the off position, no hardware is visible. Just pull up and turn 90 degrees to engage. Get yours now!