Black Ironhead Sportster 1-3/4" exhaust pipe mounting bracket is used to mount drag pipes/mufflers with the use of T bolts.
Originally #BK-4, by Cycle Shack, 1970-2018.
Bracket fits 1957-1978 XL models. Measures 6-3/4" from front left hole to stud, 2" center-to-center of the studs and 12-1/4" from front right hole to stud.
Note: Some additional hardware may be required depending on application & brand of drag pipes being mounted.