IMCA Modified and Street Stocks. Also fits upper and lower taper of Pinto spindles. Fits most racing upper a-arms. Stud is 3/8" longer to raise roll center.
 
Housing only 1210-503 std length 3.850"
 
Stud only std. 9029-221, +.1" 9029-202, +.5"+ 9029-203