01
Real experience
We test before we recommend.
PRODUCT DESCRIPTION
RacingDiffs 188mm Limited Slip Differential (LSD) Upgrade for BMW - Enhance Your Driving Experience
Do you own a BMW E30, E36, E28, E34, E32, Z1, or Z3 model? Restore and enhance your limited-slip differential's performance with RacingDiffs upgrade kits, designed specifically for the 188mm LSD.
BMW's medium-case LSD (188mm) was found in most 6-cylinder models up to 1999, such as:
3 Series: E30, E36
5 Series: E28, E34
7 Series: E24, E32
Z Series: Z1, Z3
Important notes:
* If you buy the kits including the machined steel cover, remember to indicate the gear ratio of your differential. There are two types of covers depending on the gear ratio (2.64-3.07 and 3.15-4.45), so you must indicate which one you want us to send you.
Each kit is Plug & Play; no modifications required.
BMW 188mm Limited Slip Differential (LSD) Upgrade by RacingDiffs
By replacing existing clutches with new ones, you will renew your differential and restore its original performance. For better performance and higher intensity in daily use, both on the road and on the track, we recommend Stage 1 and 2 packages. For maximum performance, check out Stage 3 and 4 packages. Plus, we offer a lifetime warranty on these kits!
Choose your performance level
Service Pack: Ideal for daily driving, includes a 2-clutch kit that will restore your differential to factory settings.
Set of 2 clutches
Street Pack (Stage 1): Ideal for sporty road driving, this set includes a 3-clutch set, a preload shim set, and a ramp protector shim for smoother locking.
Set of 3 clutches
Set of preload shims
Ramp protector shim
Track Pack (Stage 2): Going to the track? Get the 4-clutch set, machined steel cover, preload shim set, and ramp protector shim for maximum grip and traction.
Set of 4 clutches
Machined steel cover
Ramp protector shim
Set of preload shims
Race Pack (Stage 3): Designed for competition, includes a 6-clutch set, machined steel cover, preload shims and oil, and a ramp protector shim for unmatched performance.
Set of 6 clutches
Machined steel cover
Ramp protector washer
Set of preload washers
Set of oil washers
Maximum Performance Pack (Stage 4): For those who demand the best, this ultimate kit includes a 6-clutch set, a machined steel cover, a preload washer set, an oil washer set, and a multi-variable ramp set for highly customizable performance.
Set of 6 clutches
Machined steel cover
Set of preload washers
Set of oil washers
Set of multi-variable ramps
Installation and support
Each of our packages is Plug & Play and requires no modifications. Facilitate installation by visiting our YouTube channel for step-by-step tutorials.
To completely rebuild your differential, you will also need a set of bearings and oil seals.
Visit our YouTube channel for installation tutorials.
OEM Part Numbers:
33141210626
33-14-12-10-626
33 14 12 10 626
33.14.12.10.626
33141203797
33-14-12-03-797
33 14 12 03 797
33.14.12.03.797
33141203795
33-14-12-03-795
33 14 12 03 795
33.14.12.03.795
33141203794
33-14-12-03-794
33 14 12 03 794
33.14.12.03.794
33141206909
33-14-12-06-909
33 14 12 06 909
33.14.12.06.909
33141204367
33-14-12-04-367
33 14 12 04 367
33.14.12.04.367
33141206919
33-14-12-06-919
33 14 12 06 919
33.14.12.06.919










WHY THETUNERLAB
We have spent years building cars, racing, and testing the exact same parts that we sell.
01
We test before we recommend.
02
We help you choose the right part.
03
Only trusted manufacturers.
04
Before and after the purchase.
+10 years
of passion for drifting
+30.000
available products
+5.000
satisfied customers
24/7
passion for motoring
Each product indicates compatible models in the product description. If you have any questions, you can contact us and we will help you choose your best option.
-If the product is in stock, the usual delivery time is 2 to 5 working days.
-If the product is out of stock, the delivery time is 7 to 15 working days.
All our products come with the manufacturer's official warranty and comply with current regulations.
Yes. We ship orders to Spain and most European countries using specialized transport agencies.
You can contact our team via WhatsApp, email, or our website's contact form.
Shipping costs depend on the type of product, its weight, dimensions, and the destination country. In most cases, the amount is calculated automatically during the checkout process before the order is finalized.
For some products, especially large items or those with special characteristics, shipping costs may require a manual review. If the amount shown does not match the actual shipping cost, we will contact you before processing the order to inform you of the final cost and request your confirmation before proceeding. We will never charge any additional fees without your authorization.