RT Hi-Performance Springs have a high stiffness-to-mass ratio. In other words; our springs are light weight for their particular spring rate. This requires the finest materials and processing. Shot-peened and pre-set so they cannot sack out. All Race Tech Hi-Performance Springs have the highest rate tolerences in the industry.

 

These are the finest springs in the world-guaranteed!

 

If Adapter Collars are listed they are REQUIRED.