QA1 Coilover Overhaul Kit R355-175QA1 70 74 Mopar E Body Rear Coil Over Conversion Kit , Convert your classic Charger, Coronet, Challenger, Barracuda or other Mopar B or E Body vehicle from leaf spring rear suspension to a QA1 coil over kit that uses a triangulated 4 link design. This is the best way to gain a more planted feel, make room for larger wheels and tires and correct the wheelbase of classic Mopars. The kit allows you to run a 3" bumper exit exhaust. This modern design