For big horsepower Magnuson Hellcats we always recommend a new belt prior to racing and a backup belt for prolonged racing events.
60.4" Gates® FleetRunner Micro-V Serpentine Belt 10-Rib
DISCLAIMER: This part is intended for off-road use only. Big Jon Racing is not responsible for any damage resulting from improper installation or damage resulting from installing this part on your vehicle. Buyer should carefully consider the risks associated with modifying their vehicle before purchasing this part. Buyer accepts full responsibility when modifying their vehicle with this part and releases Big Jon Racing and all related parties from any and all liability.