If you're looking to re-gear your differential without getting lost in a sea of part numbers, the USA Standard Gear Ring Gear & Installation Kits are a solid choice. These kits come with everything you need in one package—think of it as a DIY kit for your drivetrain. You get a ring and pinion set along with a Master Installation Kit, which has all the bearings, seals, and other little bits that are crucial for a proper install. USA Standard Gear doesn’t mess around when it comes to quality; they put their gears through some serious testing to make sure they hold up to the grind, whether you’re commuting, hitting the trails, or just enjoying a spirited drive on a back road.

Take the USA Standard 8.25"/213mm Chrysler 3.90 Ratio Rear Ring & Pinion Gear Set, for example. This set is designed specifically for the rear end and includes that all-important 3.90 gear ratio, which can really help with acceleration and overall performance. Plus, you won’t need to hunt down extra parts—everything you need is included in the Master Install Kit. The kit uses 10mm metric ring gear bolts, so you can feel confident that it’ll fit right in.