What is the OS-FR6 Six-Speed Sequential Gearbox?

The OS-FR6 Six-Speed Sequential Gearbox is the six-speed version of the OS Giken OS-FR series, designed for compact front-engine, rear-drive cars with a teardrop case and top-mounted selector. Turn 14 lists it with a 26-spline input. Our team can help with any questions.

What are its ratios and torque rating?

OS Giken publishes ratios and ratings for the OS-FR5 and OS-FR7, but not for the six-speed. Our team will confirm the ratios and rating with OS Giken before the order is placed, so you know exactly what you are getting.

What else does an installation need?

OS Giken Japan notes that its OS-FR gearboxes are competition parts without a vehicle speed sensor, and that the prop shaft, shifter linkage and mount are made to suit each car. A Tilton direct release system is offered as an option for the release.

Which clutch does it need?

Turn 14 lists the OS-FR6 with a 26-spline input. Our team will confirm the input spline and the matching OS Giken clutch for your car, since the OS-FR series uses dedicated release parts rather than the factory release. Our team can help with any questions.

Description

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Description

OS Giken OS-FR6 Six-Speed Sequential Gearbox, 26-Spline

OS Giken’s OS-FR6 Six-Speed Sequential Gearbox is the six-speed member of the OS-FR series, sold by OS Giken USA alongside the five-speed OS-FR5 and seven-speed OS-FR7. OS Giken designed the OS-FR series for Japanese sport-compact and roadster cars, and the FR in the name stands for front-engine, rear-wheel drive. The gearbox uses a teardrop-shaped case and a top-mounted gear selector so it fits the narrow transmission tunnels found in compact FR cars, and OS Giken USA names the NA and NB MX-5, the FD RX-7 and the S2000 as examples. Turn 14 lists the OS-FR6 with a 26-spline input. OS Giken does not publish separate ratios or a torque rating for the six-speed, so our team will confirm the specification with OS Giken before the order is placed.

Between the FR5 and FR7

The OS-FR6 Six-Speed Sequential Gearbox sits between the OS-FR5, rated at up to 575 lb-ft with five gears, and the OS-FR7, rated at up to 430 lb-ft with seven gears and a drop-gear design.

Features

Six-speed sequential gearbox in the OS-FR series
26-spline input, per Turn 14
Teardrop case and top-mounted selector for tight tunnels
Made for compact front-engine, rear-drive cars

Applications

Front-engine, rear-drive compact cars: Custom installation | examples named by OS Giken USA: Mazda MX-5 (NA / NB), Mazda RX-7 (FD), Honda S2000

Notes

OS Giken does not publish ratios or a torque rating for the OS-FR6; our team will confirm the specification with OS Giken before the order is placed
A custom installation: OS Giken Japan notes that the prop shaft, shifter linkage and gearbox mount are made to suit each car
No vehicle speed sensor is fitted, per OS Giken Japan
Ships by freight
Installation labor is not included

Frequently Asked Questions

What is the OS-FR6 Six-Speed Sequential Gearbox? The OS-FR6 Six-Speed Sequential Gearbox is the six-speed version of the OS Giken OS-FR series, designed for compact front-engine, rear-drive cars with a teardrop case and top-mounted selector. Turn 14 lists it with a 26-spline input. Our team can help with any questions.
What are its ratios and torque rating? OS Giken publishes ratios and ratings for the OS-FR5 and OS-FR7, but not for the six-speed. Our team will confirm the ratios and rating with OS Giken before the order is placed, so you know exactly what you are getting.
Which cars can it be fitted to? OS Giken designed the OS-FR series for compact front-engine, rear-drive cars, and OS Giken USA names the NA and NB MX-5, the FD RX-7 and the S2000 as examples. It is a custom installation, so our team will talk through your car before the order is placed.
What else does an installation need? OS Giken Japan notes that its OS-FR gearboxes are competition parts without a vehicle speed sensor, and that the prop shaft, shifter linkage and mount are made to suit each car. A Tilton direct release system is offered as an option for the release.
Which clutch does it need? Turn 14 lists the OS-FR6 with a 26-spline input. Our team will confirm the input spline and the matching OS Giken clutch for your car, since the OS-FR series uses dedicated release parts rather than the factory release. Our team can help with any questions.

About OS Giken

OS Giken was founded in Okayama, Japan in 1973 by Masaharu Okazaki. It built the TC16 and TC24-B1 DOHC cylinder heads for Nissan L-series engines, began making multi-plate racing clutches in 1982 and started supplying OEM limited-slip differentials in 1983. Development of the Super Lock LSD began in 1997, and of the OS-88 sequential gearbox for the Skyline GT-R in 1998.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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OS Giken OS-FR6 Six-Speed Sequential Gearbox, 26-Spline [OS071-FR6]

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OS Giken OS-FR6 Six-Speed Sequential Gearbox, 26-Spline

Between the FR5 and FR7

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews