Collection: OS Giken

Founded in 1969 in Japan, OS Giken started as a small precision engineering company focused on high-performance drivetrain components. They gained recognition in the motorsports and import tuning communities, particularly with Nissan, Honda, and Toyota platforms, for their limited-slip differentials, clutches, and racing transmissions. Over time, OS Giken grew into a globally respected brand, trusted by street tuners, track racers, and professional motorsports teams for durable, race-proven components that deliver precision, reliability, and extreme performance under high-stress conditions.