This little bracket bolts to the back of our billet air filter adapter to keep the choke lever in place. Without the stock air box, or this little device, the choke lever will pop off. This bracket requires the odd-shaped, thick, rubber-coated metal gasket (ARC_DJ-1315) that goes between the air filter and carb. Some of the newer engine models, such as the 2009 Harbor Freight "Greyhound" version of the clones have a thinner fiber gasket that is not thick enough to provide room for the choke hold, so you will have to also buy the gasket.