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BMW E30 / E36 / Z3 / E28 – 188 mm Rear Differential
Plate Type LSD | Limited-Slip Differential
Applications
BMW 3 Series
E30 (1982–1994)
320i (manual & automatic)
323i
325i / 325is / 325ix (AWD versions use 188 mm front & rear differentials) Engines: M20
325e / 325es
M3 E30 – S14 engine
E36 (1990–2000)
318ti Compact (selected variants) – M42 / M44
320i / 323i / 325i / 328i – M50 / M52
M3 3.0 – S50B30 engine (Europe, 188 mm LSD)
Z3
1.9 / 2.0 / 2.2 / 2.8 / 3.0
BMW 5 Series
E28 (1981–1988)
520i / 525i / 528e / 528i – M30 engines
Design & Manufacturing
Our plate-type limited-slip differentials are manufactured from FORGED Nickel-Chromoly steel and subjected to advanced heat treatments such as Super Sub-Zero / Cryogenic treatment.
Additionally, all critical components undergo shot peening and WPC treatment, significantly improving:
Core and surface strength
Wear resistance
Fatigue life
The combination of high-strength forged material and an optimized internal design featuring large windows and multiple oil holes results in:
Reduced internal friction
Improved internal lubrication
Lower overall weight
Enhanced thermal stability
As a result, our LSDs deliver stable and predictable performance with exceptional durability, typically requiring no servicing during the first ~2,000 km of special stages under normal competition use.
Technical Specifications
Plate-type LSD with 20 friction plates → The only product on the market with this configuration
Ultra-lightweight design: approx. 6.65 kg (lightest in its class)
Stable preload values, even during long endurance races
All our plated LSDs feature dual ramp bodies. Factory ramp configuration for this application: 35 / 67.5 & 35 / 90
Other ramp angles are available upon request.
Included Components (Free of Charge)
✔ Two additional thicker Belleville / conical washers Each washer provides approximately +20 Nm of additional preload, allowing users to experiment with higher preload settings.
Warranty & Intended Use
1-year motorsport warranty covering material or manufacturing defects
Recommended for competition use only
Important Reminder – Gear Oil
For correct operation and maximum service life, we strongly recommend the use of LS (Limited Slip) gear oils specifically formulated for plate-type LSDs.
Typical recommended viscosity: SAE 75W-140 LS
Only oils with LS specification must be used
It is also recommended to pre-lubricate the LSD with gear oil during installation.
⚠️ Note: Although an anti-corrosion oil is applied during factory assembly, it does not provide lubrication.
The flywheel is very light compared to the stock one. Overall it looks very good and it fits perfect with the oem clutch. The car is already very light (under 600kg) and it's a perfect match. It revs a lot quicker and the up shifts are very fast. The downshifts should be very precise with heel and toe most of the time. Overall I'm very happy.
The quality looks decent exactly as the pictures. The oem ring gear (95mm) fits snugly and overall seems very good. The gearbox is alredy assembled an soon I'll test it. Also the delivery was quick and the comunication with RSX was fine.
I am very satisfied, the quality is in the details, the phases are made everywhere, there is nothing sharp anywhere, also, at my request, they made a special adapter part for my gearbox, at this stage I am very satisfied
