Includes (1) Heavy Duty Brake Drum/Hub for EZGO Gas Golf Carts. Fits EZGO TXT, Marathon and Medalist Golf Carts 1982 & up. Fits Gas models only. Spline count = 30. Tired of stripping out your brake drums? Here's the solution. Try out this Heavy Duty Hub/Drum and consider your problem solved. Made of carbon steel. It is important that you know the year, make, model and size of the spline on your golf cart before purchasing this brake drum & hub. Will NOT fit electric golf carts unless your cart was modified with a gas rear end. Gas carts have a larger spline(30 spline). Electric carts have a smaller spline(24 spline). The 30-spline will use a ¾-16 UNF thread and should be torqued to 140-160 ft.-lbs. Once you have reached the torque spec, if the castellated nut doesn’t line up with the hole in the axle shaft for the cotter pin, only tighten further enough to align the two. It is important that you use manufacturer's recommended spline lube (like anti-seize) to prevent stripping of splines. It is also important that you know the size of the spline before purchasing this Ausco brake drum. Some electric carts may have the larger spline and gas carts could have the smaller spline, depending on whether or not your cart has been modified. Please verify before ordering. We do not know what spline size you need, therefore, we send what you order. If you have an electric cart, check out our listing for the Heavy Duty Brake Drum/Hub for electric models. Will NOT fit EZGO RXV models. Professional Installation is highly recommended. We do NOT offer technical support.