Mishimoto 2015+ Hellcat Aluminum Expansion Tank - BlackDodge and Chrysler have carefully crafted the 2015+ 6. 4L Dodge Charger, Challenger, and their 6. 2L Hellcat variants with imposing exteriors that live up to their namesakes. One would expect the same attention to detail under the hood and, for the most part, it all adds up except one part: the factory expansion tank. Sticking out like a sore thumb, the dull yellow reservoir for your Mopar's coolant ends the envy brought on by the exterior. Looks