aFe 37-S7001R aFe CONTROL RaceRunner Rear Coil SpringsaFe 37 S7001R aFe CONTROL RaceRunner Rear Coil Springs aFe CONTROL RaceRunner rear leveling coil springs will raise the rear of your JL approximately 1 IN from factory ride height for increased ground clearance, and improve overall vehicle stability. These coil springs will work with the factory shocks or aFe Powers RaceRunner series shocks. Rear Leveling Springs: These Coil Springs Offer 1 IN Rear Lift to Improve Stability and Provide Increased