Description Patented exclusively by QA1 for circle track racing applications, ball joints offer ultimate, low friction operation. Completely smooth and bind-free, ball joints’ infinite preload adjustment allows breakaway torque to be set as low as 0 ft./lbs. Replacement studs may be purchased separately – 1210-503 Standard / 9029-203 .5″ 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 – Used on IMCA cars to raise roll center – Harris w/Impala spindles; new Victory
