The new SWORKz Black Competition springs were tested by factory drivers in many international big events. From the results it shows that new black competition springs can offer more linear performance. They improve the buggy's jumps, landings, corner speed even in bumpy conditions. The springs come with laser engraved markings, letting users know which springs they are using to setup their cars. There are 6 types of front springs and 3 types of rear springs to choose from.