How do you make the toughest Monster Truck even tougher? Here’s how! HPI Racing introduces a complete set of parts to build ALLOY GEAR CASES for the Savage! Made from high quality aluminum, these differential housings come with everything needed to install them in any of the Savage line of Nitro monster trucks and include features such as steel cross pin supports and extremely accurate tolerances to help all of your differential parts in alignment even under massive loads. After hours and hours of testing R&D has determined that these parts can take any amount of power that you can throw at them. So if you are ready to take your Savage to the next level, these are the parts that will take you there.