QA1 Mopar 4-Link Sway Bar Kit Rear 7/8inQA1 sway bars complete the suspension upgrade for the front of 62 76 A body, 62 74 B body and 70 74 E body Mopars. For use with QA1's K members, control arms, and rear 4 link, these sway bars are made using 1 hollow 4130 chromoly steel with a 3 16'' wall and are designed to improve performance and handling. These directly bolt on to QA1's K members and lower control arms and are not designed to work with factory K member or rear factory leaf springs.