Can the ICON 2007 - 2018 Jeep JK 6" coilover conversion springs be upgraded to a heavier rate coil spring?
No, Icon does not offer a heavier rate coil springs for the 2007 - 2018 JK 4.5”-6”coilovers. There are other spring manufacturers that make a coil spring of similar dimensions to the ICON coil spring, however the max thread showing would have to be calculated based on the specifications of that coil spring. Contact ICON tech-support for more details (951) 689-ICON.