This Stage 1 kit for the 9R is truly an all-around performer. It utilizes our Lightweight Silencer that sheds 7.7 pounds while delivering 2 horsepower peak with improved throttle response. This is combined with the SLP Power Shift™ Clutch Kit that uses the all new SLP Magnum Force™ Weight set designed specifically for the 9R/P22 clutch combination. This Magnum Force™ Weight set harnesses the fantastic power of the 9R delivering ultimate throttle response and overall power. This results in a consistent running sled that is nothing short of FUN!