The Gboost belt series: THE ONLY belts to buy. The next generations in belt durability from GBoost. Stronger, lower belt temps, better performing, and longer lasting than any other out there by well over 150%. KWI has been aggressively testing these in all forms of Dunes, Desert racing, High altitude, and big turbo high HP cars all over the world, and results have proven excellent belt life, smoother shift characteristics, and higher wheel HP than ever thought possible.