This is a common swap to change your gear ratio to help get your big heavy ride out of the hole faster. This is one of the most cost-effective upgrades for your HellCat to really notice an increase in 0 to 60 times!
These differentials are genuine mopar parts and come with everything you need including differential oil a TRU bolt in experience (although differentials are filled with Lube from the factory we still suggest checking the oil before installation)   
$1299 SHIPPED to the Continental USA

Hellcat 3.09 Differential Upgrade