BC Racing utilizes 3 main spring designs: linear, S-barrel, and V-barrel. All of these springs have their intended uses in our coilover systems depending on the OEM suspension design, as well as the design of our kits. Every one of our springs is made of SAE9254 steel material and utilizes a Zinc coating under the outer powder coating to ensure rust does not penetrate the metal of the spring and compromise performance/reliability. We have springs available in as small as 120mm length and as great as 300mm length. Spring rates are available in select spring lengths from 2KG up to 22KG.

Many manufacturers now use different sized mounting points for OEM springs. In these instances, we create a custom wound spring classified as a V-barrel. Utilizing a V-barrel allows our spring to fit in the OEM spring cup while allowing us to size the other end for our height adjusters. Full height adjustability is retained to our specifications but there is a draw back; since the spring is custom wound for the application, your choices in shorter and stiffer/softer springs are limited, sometimes to a single option per vehicle application. On a V-barrel spring you will notice 4 sets of numbers instead of the 3. The rubric to decipher this is:

First set of numbers- Refers to the ID of the smaller end of the spring
Second set of numbers- Refers to the ID of the spring where it mates to the OEM spring bucket
Third set of numbers- Refers to the static length of the spring in mm
Fourth set of numbers- Refers to the spring rate in Kgf/mm