Litens HellRaiser 2.72" Pulley Kit for 15-Current Demon, Jeep Trackhawk, RAM TRX, Challenger, Charger & Durango SRT Hellcat 6.2LPart# 920666K Since the Hellcat first hit the market, it's been debated as to how much safer a clutched pulley just like the OEM decoupling 3. 35" would be on modified IHI Hellcat superchargers. Litens comes through with their high quality heavy duty 2. 72 pulley upgrade. Using the OEM design developed specifically by Litens this pulley will reduce stress and associated wear on your supercharger's bearings and rotors. Kit Includes: 1 2. 72" Litens