VP-Pro USA is now stocking 1.4mm wire Buggy Progressive Shock Springs for 15-17mm Shocks. We have 3 fronts and 3 rears in soft, medium, and hard firmness. Fits on INTECH and Agama spring cups perfect.

These are accurate - all the same size wire and same length (short front/long rear) so you know which ones are softer/harder - no more guessing.

Since they are all the same size diameter wire, the firmness is controlled by the number of coils.

Less Coils = Harder
More Coils = Softer

The progressive springs feel softer at first, then get slightly stiffer as they are compressed. This allows thinner oil to be used, allows the car to soak up small bumps better, and helps keep the chassis from bottoming out on landings.

They are all black with a colored dot on one end for easy identification. The black gives a clean/neutral look that will match all paint schemes as well.