OS Giken 72-88 Porsche 915/930 MT Various Super Lock LSD 28/25-456-12-10S COARSE Spline

Upgrade the traction and power delivery of your compatible Porsche with the OS Giken Super Lock Limited Slip Differential, part number PR014-HA. Designed for select Porsche 915/930 manual transmission applications, this differential helps distribute torque more effectively between the drive wheels, supporting improved acceleration, corner-exit performance, and control in demanding driving conditions. Its Super Lock design is engineered for high-performance use while maintaining precise, consistent operation.

This OS Giken LSD features a 28/25-456-12-10S configuration with a coarse spline design for compatibility with the specified drivetrain application. It is intended for installation in 1978 and 1979 Porsche 930 vehicles and should be verified against the vehicle’s transmission, axle, and differential specifications before ordering. Professional installation is recommended to ensure correct setup, preload, gear engagement, and drivetrain function.

Built for enthusiasts seeking enhanced traction without compromising the character of a manual-transmission Porsche, the OS Giken Super Lock LSD is a performance-focused replacement or upgrade for suitable motorsport, street-performance, and high-output applications. Confirm fitment and installation requirements with a qualified Porsche drivetrain specialist before installation.

Features:

• Brand: OS Giken

• Part Number: PR014-HA

• Product Type: Super Lock limited slip differential

• Vehicle Fitment: 1978 Porsche 930 and 1979 Porsche 930

• Transmission Application: Porsche 915/930 manual transmission

• Spline Type: Coarse spline

• Differential Configuration: 28/25-456-12-10S

• Performance Benefit: Helps improve torque distribution, traction, and corner-exit control