Manufactured of SAE9254 steel with zinc undercoating and outer powder coating to ensure rust does not penetrate the metal of the spring and compromise performance or reliability. The center winds are bowed out to allow for a greater spring stroke with the use of a shorter spring.

Available in limited lengths and rates, BC Racing S-Barrel springs may be replaced with BC Racing Linear springs in order to accommodate custom builds, but there are instances when we are not able to utilize a linear spring, such as I.R.S. (Independent Rear Suspension).