Drag Racing Shocks and Replacement Parts.

The 8212 SPA1 series of dampers is an aluminum bodied coilover that features externally adjustable rebound and compression damping.  Due to its unique valving and wide range of adjustment, this drag racing damper satisfies a wide range of suspension configurations and spring rates.  The 8212 SPA1 is fully rebuildable and comes complete with 2.5” I.D. spring hardware and 1/2" I.D. spherical bearings.
For KONl rear SPA1 shock, there is a big difference. They have nearly zero bump (compression) damping and the rebound damping is digressive. Digressive means they are designed to digress, or “blow off” at high piston speed. Why? Well, if you had the velocity sensitive type setting on the front shocks use, it would be possible to grossly over damp the rear suspension on initial launch, thereby picking up the rear wheels. The rear SPA1 KONl will “blow off’ then, and allow proper “unwinding” of the rear suspension.