these are a must have if you're running an aftermarket air cleaner or velocity stack, or taking the time to detail your engine, and recommended to use when you use breather bolts like the ones BCM makes(Willis Bolts: for sale here also). They hold the carb tight in the rubber coupler of the intake manifold and look great while doing it. Hand made in the USA out of lightweight aluminum. These will bolt on in about 5 minutes. Sold as a pair.
fits '91-'06 Sportster (XL)