Mazda MX5 & RX8 LSD Upgrade Kits – Fuji and Super LSD Performance Boost

• Mazda RX-8 – Super LSD kit: Dedicated kit designed specifically for the RX-8’s Super LSD carrier.
• Mazda MX-5 NB/NC – Fuji LSD kit: Engineered to fit the Fuji clutch-type LSD used in MX-5 NB and NC models.

Note: These kits are for clutch-type Super / Fuji LSD units – not for Torsen differentials.

Both OEM LSDs use tiny friction cones behind the spider gears, preloaded by weak springs. These cones are the Achilles’ heel of the design – they:

• Wear quickly or break, even on low-mileage cars
• Cause inconsistent locking and unpredictable behavior
• Reduce traction during corner exit, drift initiation and braking

Our upgrade kits remove the cones entirely and replace them with proper clutch plates, stronger springs and preload shims, turning the LSD into a reliable, performance-oriented unit.

• High-performance clutch plates – replace fragile OEM friction cones
• Precision preload shims – set the correct locking force
• 4× stronger springs – dramatically increase clamping and response
• All parts sized specifically for either RX-8 Super LSD or MX-5 Fuji LSD

The result is up to 4× better performance and vastly improved reliability compared to the stock cone-based design.

• Custom-fit kits for Mazda RX-8 Super LSD and Mazda MX-5 NB/NC Fuji LSD
• Replaces weak cones with durable clutch plates
• 4× stronger springs for maximum locking power
• Improved preload for better traction and cornering stability
• Eliminates common OEM failures, even on low-mileage cars
• Ideal for spirited street driving, track days and drifting

Designed for:

• Mazda RX-8 equipped with the factory Super LSD
• Mazda MX-5 NB / NC equipped with the factory Fuji clutch-type LSD

If you are unsure which LSD type your car has, you can:

• Check the differential markings (Super LSD / Fuji LSD)
• Send us photos and VIN so we can confirm the correct kit

Recommended for owners who demand consistent traction and predictable locking behavior on road, track or drift events.

• Dedicated upgrade kits for each specific LSD type (no universal compromises)
• Track-proven clutch technology and high-quality materials
• Huge improvement in grip, control and reliability over OEM design
• Worldwide express shipping and technical support

Result: Your RX-8 or MX-5 finally gets the LSD performance it deserves.