This is our optional 4" rear coil spring that is available for use in our JK 2 or 4-door Johnny Joint® suspension systems. This spring is 1" taller than our standard spring and is most commonly used In heavily loaded or and/or hard top 2 or 4 door applications, This spring may also be used in combination with our CE-9132R spring to address vehicle lean issues. This spring is a dual rate with a combined rate of 88lbs. and a free length of 19.55". Gloss black powder coated finish. If you need help choosing the correct springs for your Jeep - just call the RockJock sales staff!