http://www.hpiracing.com/products/en/102272/
COMPOSITE GEAR BOX/BULKHEAD SET
Use your arrow keys to move through the images. This Composite Gear Box/Bulkhead Set is an official HPI replacement part for the Savage Flux HP truck. It's molded from stiff composite material for extra strength that helps hold the differential firmly in place, perfect for high horsepower applications. This set is also a popular high performance upgrade for Savage X trucks. Includes the molded gear box/bulkhead parts tree and mounting screws.