01
Real experience
We test before we recommend.
PRODUCT DESCRIPTION
Enhance Your BMW's Limited-Slip Differential (LSD) Performance with RacingDiffs Preload Washers
A common issue in ZF limited-slip differentials found in BMW models like the E30, E36, and E34 is the loosening or damage of preload washers (Belleville washers) due to overheating. To maintain optimal performance and reliability, it is crucial to replace these washers during an LSD rebuild.
Why Choose RacingDiffs Preload Washers?
Superior Strength: Our preload washers are 30% stronger than OEM, providing significantly improved LSD performance with better lock-up and traction.
Increased Durability: With an extra hardness of 55 HRC, these washers offer an extended lifespan and superior performance under extreme conditions.
Comprehensive Solution: When replacing preload washers, we also recommend changing the clutch plates, as they are often the primary cause of differential overheating.
Key Features:
Improved Performance: Enhanced preload ensures better lock-up and traction, improving your BMW's handling in all driving conditions.
Durable Construction: Designed to withstand high temperatures and stress, guaranteeing your differential's reliability for longer.
Various Sizes: Available in three different sizes (168mm, 188mm, and 210mm) to fit various BMW models. Unsure which size is right? Send us your VIN, and we will confirm the correct size for your vehicle.
Compatibility Note:
The 210mm preload washers are not compatible with GKN differentials in E46, E92, E60, E63, and Z4 M models.
For backlash-free solutions, explore our LSD Clutch Kits + Backlash-Free Shim Kits for models like M3, M5, M6, and Z4M.
Maintain and Enhance Your Differential: Regular maintenance and proper upgrades can significantly optimize your BMW's driving experience. Trust RacingDiffs for high-quality differential components that keep your vehicle in top condition.










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.