OS Giken OS-FR Series Sequential Gearbox – 6-Speed | 26-Spline | FR Platform

Elevate your FR platform build to full competition specification with the OS Giken OS-FR Series Sequential Gearbox — a purpose-built 6-speed sequential transmission engineered for front-engine, rear-wheel-drive motorsport applications. OS Giken is Japan's most respected manufacturer of competition-grade drivetrain components, with a global motorsport heritage spanning professional circuit racing, time attack, drift, and rally. The OS-FR sequential gearbox delivers the rapid, clutchless sequential gear changes, mechanical precision, and competition-proven durability that professional motorsport demands — in a package engineered for FR platform fitment with a 26-spline output shaft.

Key Features

• 6-Speed Sequential Transmission: Full 6-speed sequential gearbox with rapid, positive gear engagement — eliminates the shift time and missed-shift risk of a conventional H-pattern manual transmission under competition conditions
• 26-Spline Output Shaft: 26-spline output shaft for high-torque drivetrain applications — verify compatibility with your driveshaft and differential before ordering
• FR Platform Engineered: OS-FR series designed for front-engine, rear-wheel-drive platform applications — consult OS Giken or your drivetrain specialist for specific vehicle fitment confirmation
• Competition-Grade Construction: Built to OS Giken's exacting competition standards — the same quality and engineering that equips professional motorsport teams worldwide
• OS Giken Pedigree: Manufactured by OS Giken — Japan's premier competition drivetrain manufacturer, trusted by professional teams across circuit racing, time attack, drift, and rally disciplines globally

Specifications

• Type: Sequential Gearbox
• Series: OS-FR
• Speeds: 6-Speed
• Output Spline: 26-Spline
• Platform: FR (Front-Engine, Rear-Wheel-Drive)
• Part Number: OS071-FR6

Note: Competition-grade sequential gearbox — professional installation by an experienced drivetrain specialist is required. Verify vehicle fitment, bellhousing compatibility, output shaft spline count, and driveshaft compatibility for your specific build before ordering. A full drivetrain consultation with OS Giken or an authorized dealer is strongly recommended prior to purchase. Lead times may apply — contact us before ordering.