Jeep ZJ Coil Correction Plates 93-98 Jeep ZJ Pair Artec IndustriesCoil Correction Plate. Our new Coil Correction Plates weld to your bottom flat plate and provide the coil a better base to rest on, one that actually follows the curvature of the springs. These plates will help eliminate spring bowing that is commonly found under coil suspensions that use flat coil perches. Details: Sold as Pairs. Have a problem with bowing springs? Do your coil springs with an uneven bottom sit on a flat plate? Made from 1 2 inch