OS Giken NS082-HA Super Lock LSD for Datsun 280Z/280ZX/300ZX R200 10mm

Vehicle Fitment

• 1975-1978 Datsun 280Z (S30), L6 engine, Long Nose R200 differential
• 1979-1983 Datsun/Nissan 280ZX (S130), L6 engine, Long Nose R200 differential
• 1984+ Nissan 300ZX (Z31), Long Nose R200 differential - early production only, before the mid-cycle switch to 12mm ring gear bolts

Fitment Notes

• Fits Long Nose R200 differentials using 10mm ring gear bolt holes only - for 12mm ring gear bolt hole differentials, use OS Giken part NS091-HA instead
• Verify your differential's ring gear bolt size before ordering, as both 10mm and 12mm variants of the Long Nose R200 were used across this production span
• Reuses factory 10mm bolts during installation
• Refer to the OEM service manual for installation guidance

Features

• Patented pressure ring design for smooth, progressive, and quiet locking behavior
• Spline-through-side-gear design allowing fitment of up to 28 friction plates - up to 2x more than competing designs
• True 100% progressive lock capability for consistent power delivery under load
• Low preload standard spec that feels close to an open differential at low speed while locking fully under load
• LSD case machined from a single billet piece for consistent uniformity
• Initial torque adjustable using thicker or thinner cone springs
• Lock progression timing tunable via pressure ring spring selection
• All components chemically heat-treated, high-grade steel alloy construction with raw-forged gears

Specifications

• Differential type: Long Nose R200, 10mm ring gear bolts
• Ramps: 25/38 (1.5-way)
• Lock timing: 336
• Total plates: 20
• Preload: 8S

Included Components

• 1x OS Giken Super Lock LSD Unit (NS082-HA)

Product Description

The OS Giken NS082-HA Super Lock LSD is a clutch-type limited slip differential engineered for the classic Nissan/Datsun Long Nose R200 differential found in the 280Z, 280ZX, and early 300ZX (Z31) - specifically the 10mm ring gear bolt variant used across these earlier production years. Built on OS Giken's patented pressure ring design, the Super Lock LSD achieves true 100% progressive lock while operating smoothly and quietly, a significant step up from the factory open or worn LSD units commonly found in these vintage Z-cars.

The spline-through-side-gear architecture allows for up to 28 friction plates, giving this LSD substantially more locking capacity than most competing designs, while the single-piece billet case construction ensures long-term uniformity and durability. Owners can further tune the differential's behavior - adjusting initial torque with different cone spring thicknesses and fine-tuning lock progression timing through pressure ring spring selection - to match their specific driving style, whether for street use, autocross, or vintage racing.

This LSD is a strong upgrade for owners restoring or modernizing a classic 280Z, 280ZX, or early 300ZX who want genuine mechanical traction improvement without giving up everyday drivability. Because the Long Nose R200 differential was produced with both 10mm and 12mm ring gear bolt patterns across its production run, confirming bolt size before ordering is essential - this unit is built specifically for the 10mm bolt pattern, with OS Giken's NS091-HA covering the 12mm variant.