With multiple S550 IRS cars in the 1.1 sixty-foot zone, rest assured that our specific valving and spring rates for your application will provide you with the best possible results.
This Viking Berserker coilover kit features KellTrac spec'd spring rates, compression and rebound valving specific for S550 IRS applications.
*We recommend BMR or Maximum Motorsports Caster Camber plates to complete the installation of this kit.