RacingDiffs Rear LSD Clutch plate service kit! A simple and effective way to spin both wheels!
As I write this the year is currently 2026… which for 2004-2006 Sti owner’s this means these cars are all over 20 years old. For 04-05 and early 06 owner’s this means you have a limited slip differential in the rear that utilize a set of plates to drive both wheels at similar speeds. These plates wear when the limited slip is activated and over time the rear diff ability to activate and power will start to fade. Does RacingDiffs have the answer for you? Read on to find out.
With these plates you can easily remove the old plates and upgrade the differentials abilities
RacingDiffs have thought of this and have put together a set to get your diff working at full capacity once again. So what comes in the kit? You will get 6 external plates and 4 internal plates to replace you factory setup. And lastly you get two cone springs, these help with preload and activation. The spring cones are quick to wear, so these are one of the most important pieces to replace.
The two plates on top are your spring plates which help apply force to plates below.
To increase their durability the plates have been Molybdenum-ceramic coating to remove the metal shavings that shed from the factory plates. The coating also helps lower temperatures in the diff by 15% which is beneficial on and off the track for longevity.
We can see the grippy surface and passages for the oil to keep them well lubricated
Differences between the factory plates and RacingDiffs units.
The set comes complete and is a plug and play setup. Once the differential is removed and opened up, you will just need to remove the old plates and install the new RacingDiffs plates. RacingDiffs recommends using Motul Gear Competition 90-140W fluid. Questions, comments, concerns? Leave them below!
If you want to mimic the factory stack setup. This is what you are looking at.