This upgrade is almost required for any ProCharger Stage 2 HEMI supercharger kit producing over 600rwhp. The base cog belt will typically snap or shred during the high rpm shift points from what we have experienced. If you are producing over 1000 horsepower, you may go through these belts from time to time if you are tuned for with hard shifts as well and you probably would want to keep a few on hand for such occasions as track days.
