The Slash 4X4's fully adjustable suspension gives it an edge in any race, and with Traxxas progressive-rate tuning springs, you can hone your truck's handling to an ever greater degree of precision. Custom-wound specifically for Slash 4X4, the tuning springs are available in four rates to suit any setup.
These springs are a stiffer then the originals so you'll get less body roll and much better cornering speed and overall responsiveness. You'll still get body roll but the front suspension won't lean anywhere near as hard into turns. Also FWI these springs are a little shorter then the stock springs so you'll need to add a medium spacer to make the front suspension arms level.