| Progressive Springs change rate and become stiffer the further they are compressed depending on its length. Rate progresses from 150 lbs/in to approximately 225 lbs/in depending on the degree of compression and length of spring. When ordering, specify the desired length. Lengths come in 11", 11.5", 12" and 12.5".
Note: Determine if you need Draco spring spacers (DRA01) if using 3" diameter springs with a conventional 2.5" coil over kit. If so, two (2) spacers are required for each spring. (DRA12.3.185)