HPI Racing differential 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!The 29T gear is machined to use the included "oversized" ball bearing for extra durability and efficiency.
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.
i blew out the front and rear diffs doing back flips. The rebuild kits were complete and easy to rebuild with bullet proof upgrades. Excellent customer service again from the guys at RC Planet