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 feature solid hub clutch disks to provide efficient transfer of power 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.
****For pure motorsports use or dual purpose vehicles, we recommend starting with our STR clutch lineup.****
Please consult installation guide
Overhaul Kits are meant for the repair and refurbishment of an OS Giken clutch kit. Overhaul kits are not universal fitment and must be specifically order for each particular model of OS Giken clutch.
Overhaul Kit A - Includes the follow parts:
Overhaul Kit B - Includes the follow parts:
The “Pre-Order” order option is enabled when the listed item is either temporarily out of stock, or is only available as a “built to order” item from our factory.
Once an order for a “Pre-Order” item is received, we will confirm lead-time with our Japan factory and contact you within 1-2 business days via email with current projected production lead-time information and delivery date projections. After accepted/authorized we will proceed with finalizing your order. If the quoted lead-time is not accepted, the order will be promptly cancelled and you will be refunded immediately in full.
If there is further delay after your placed order, we will contact you with an updated delivery lead-time or provide you with the option to cancel with a full refund for any unfulfilled order items.
While there is no risk in ordering “Pre-Order” items through our website, feel free to contact us ahead of time regarding product leadtime.
California Prop 65 Warning
*Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65warnings.ca.gov
Have your OS Super Lock LSD custom tuned to specifically match your vehicle's performance
Choose the right gear oil to ensure your OS SuperLock LSD performs properly
Using a metal alignment tool is key to proper installation of any race multi-plate clutch