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OS Giken STR Series Clutch & Flywheel Kit (04-21 STI)
The STR Clutch line-up was designed to hold high capacity power while still retaining a relatively light clutch pedal. This technology was driven from our racer's demand for a lighter clutch during long endurance races in Japan. Heavy clutch pedals lead to driver fatigue during long endurance racing.
The STR2C Twin plate dampened clutches give some forgiveness to the transmission by absorbing drivetrain shock while providing reliability and strength under heavy abuse. The end result is a quiet and reliable clutch set that will go years before needing overhaul. The STR2C is good up to about 575 lbs ft torque maximum.
CLUTCH COVER
Our specially designed clutch cover contains a unique leverage mechanism for the diaphragm spring, resulting in a higher clamping load of the clutch disc(s) while also reducing pedal effort. These diaphragm springs combined with our special OS Giken Release Sleeves provide a much easier to operate clutch.
DISCS
We utilize full face metallic clutch plates to achieve high torque capacity from our clutches. This allows for us to use much softer diaphragm springs to achieve equal or better torque capacity compared to our competitors with substantially less pedal effort.
We utilize full face metallic clutch plates to achieve high torque capacity from our clutches. This allows for us to use much softer diaphragm springs to achieve equal or better torque capacity compared to our competitors with substantially less pedal effort.
CLUTCH HOUSING
Integrated ventilation holes reduce heat generated inside the clutch system and allows for friction plate dust to exit outside the clutch system, thus increasing reliability and safety. Both the clutch housing and flywheel are chemically heat treated to handle extreme conditions. Increased power output typically requires more torque capacity(friction) in order to hold. This often leads to more heat being generated
FLYWHEEL
Our hardened steel alloy flywheels provide superior durability and life than aluminum flywheels, which also results in quicker and predictable engine response. We develop our own flywheel design to maximize our design and engineering philosophies into a no-compromise, complete clutch assembly.
Our integrated clutch and flywheel packages increase transmission efficiency and engine response. Our clutches and flywheels are built within strict tolerances and crafted using carefully selected materials to provide the highest quality and durability.
Included Components
- Dampened Single Plate Clutch Assembly with Flywheel
- OS Movement Alteration Kit
Installation Notes
- Please consult installation guide
****For pure motorsports use or dual purpose vehicles, we recommend starting with our STR clutch lineup.****
[ Special Order ]
[ Excluded from Shipping Specials ]
$2,040.00
SKU
osgSB041-BJ6
OS Giken has evolved and grown over the years, building and cementing a reputation as one of the best racing drivetrain parts manufacturers in the world. 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. Production and design capabilities for engine and drivetrain components are OS Giken's specialty, but the company has the ability to design and build just about anything mechanical. As the design, construction, and usage of the automobile evolves, OS Giken looks forward to the challenges presented to find room for improvement!
| Year Fitments | Subaru STI |
|---|---|
| 2004 | ✓ |
| 2005 | ✓ |
| 2006 | ✓ |
| 2007 | ✓ |
| 2008 | ✓ |
| 2009 | ✓ |
| 2010 | ✓ |
| 2011 | ✓ |
| 2012 | ✓ |
| 2013 | ✓ |
| 2014 | ✓ |
| 2015 | ✓ |
| 2016 | ✓ |
| 2017 | ✓ |
| 2018 | ✓ |
| 2019 | ✓ |
| 2020 | ✓ |
| 2021 | ✓ |
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to P65Warnings
| SKU | osgSB041-BJ6 |
|---|---|
| Manufacturer's Part Number | SB041-BJ6 |
| Brand | OS GIKEN |
| Product Type | Drivetrain |
| Drivetrain | Clutches and Flywheels |