AFE 46-51002 BladeRunner Supercharger Coolant Expansion Tank for 15-23 Dodge Challenger and Charger 6.2L Hellcat. Upgrade your engine bay with the aFe POWER BladeRunner GT Series Supercharger Coolant Expansion Tank. Constructed from 100% TIG-welded aluminum with billet aluminum fittings, this tank offers a 10% capacity increase for added reliability. It also features a sight tube with stainless steel fittings and fits seamlessly with the factory expansion tank cap.