Article no.:
MZ111-GC
Questions about the product? Write us!
OS Giken Mazda RX7 FC3S 13BT 5 Speed Close Ratio Gear Kit with Input Shaft
This OS Giken Close Ratio Gear Kit is engineered specifically for the Mazda RX7 FC3S with the 13BT rotary engine. Designed to enhance drivetrain performance, the kit features carefully calculated gear ratios to keep the engine operating within its optimal power band, maximizing acceleration and power transfer efficiency.
Constructed from high-quality forged materials, the gears undergo hard shot peening for increased strength and durability. The helical-cut design ensures quiet and smooth operation, suitable for both street driving and racing conditions.
- Close ratio gear set optimized for Mazda RX7 FC3S 13BT
- 5-speed gear ratios: 1st: 2.578, 2nd: 1.772, 3rd: 1.289, 4th: 1.000, 5th: 0.821
- Includes reinforced input shaft for enhanced strength
- Helical-cut gears for smooth and quiet operation
- Forged materials with hard shot peening for durability
- OEM synchros and bearings required for installation (not included)
| Make | Model | Year | Type |
|---|---|---|---|
| Mazda | RX-7 | 1986 | Base |
| Mazda | RX-7 | 1986 | GXL |
| Mazda | RX-7 | 1986 | Turbo |
| Mazda | RX-7 | 1987 | Base |
| Mazda | RX-7 | 1987 | Base 2+2 |
| Mazda | RX-7 | 1987 | GXL |
| Mazda | RX-7 | 1987 | GXL 2+2 |
| Mazda | RX-7 | 1987 | LX |
| Mazda | RX-7 | 1987 | LX 2+2 |
| Mazda | RX-7 | 1987 | Sport |
| Mazda | RX-7 | 1987 | Turbo |
| Mazda | RX-7 | 1988 | 10th Anniversary |
| Mazda | RX-7 | 1988 | Convertible |
| Mazda | RX-7 | 1988 | GTU |
| Mazda | RX-7 | 1988 | GXL |
| Mazda | RX-7 | 1988 | GXL 2+2 |
| Mazda | RX-7 | 1988 | SE |
| Mazda | RX-7 | 1988 | SE 2+2 |
| Mazda | RX-7 | 1988 | Turbo |
| Mazda | RX-7 | 1989 | Convertible |
| Mazda | RX-7 | 1989 | GTU |
| Mazda | RX-7 | 1989 | GTUs |
| Mazda | RX-7 | 1989 | GXL |
| Mazda | RX-7 | 1989 | GXL 2+2 |
| Mazda | RX-7 | 1989 | Turbo |
| Mazda | RX-7 | 1990 | Convertible |
| Mazda | RX-7 | 1990 | GTU |
| Mazda | RX-7 | 1990 | GTUs |
| Mazda | RX-7 | 1990 | GXL |
| Mazda | RX-7 | 1990 | GXL 2+2 |
| Mazda | RX-7 | 1990 | Turbo |
| Mazda | RX-7 | 1991 | Base |
| Mazda | RX-7 | 1991 | Convertible |
| Mazda | RX-7 | 1991 | Turbo |
Starting in the early 1960's, Masaharu Okazaki set out on a mission to build high-performance Japanese race engines to compete with the championship-winning European offerings of the time. Armed only with a pure passion for motorsports and an innate ability to absorb information, he basically took things apart in his garage, figured out how they work, and designed improvements to increase performance. A self-educated man, he originally began working on motorcycles and eventually moved on to parts development for 4-wheel automobiles. Mr. Okazaki founded his company, OS Giken, in the early 1970's with strength, durability, and the pursuit of high performance in mind; these goals for parts development remain true today and OS Giken has established itself in the upper-echelon for designing and manufacturing high quality, high performance, and supremely durable parts.
Officially founded in 1973, the company headquarters and factory are located in Okayama, Japan. All OS Giken parts are 100% manufactured and assembled in Japan, under very strict quality-control guidelines.
Contact
OS Giken464 Okimoto
702-8001 Naka Ward
Japan
https://osgikenusa.com/
Responsible person
Streetstylez Ltd. & Co. KGHeinrich-Lorenz-Str. 2-4
09120 Chemnitz
Germany
info@streetstylez.eu
www.streetstylez.eu
Reviews for “OS Giken Mazda RX7 FC3S 13BT 5 Speed Close Ratio Gear Kit with Input Shaft”
