HPI Racing diff gear set was developed for extremely high horsepower applications like the Savage Flux and Savage XL. It's so strong that it replaces the 86922 and 102246 Heavy Duty and Super Duty gear sets, both now discontinued. So if you're using big block nitro engines or high voltage brushless motors, get the new Machined Bulletproof gear set!

Each package upgrades one diff, we recommend getting a pair of them so you can upgrade the front and rear diffs. Fits all Savage trucks. Recommended for use with HPI102272 Composite Gear Box/Bulkhead Set.