Old-Stf neck cup set to convert 1952-77 sportsters to fit a wide variety of big twin and aftermarket front ends.No welding or machining work required. This kit converts old ball bearing XL cups for 7/8 stem front end to 1" stem front ends with Timken bearings. Also compensates for neck height increase. Comes in raw steel with bearings and races. All made in USA of course.