OS Giken – STR Twin Plate Clutch Kit – Mazda RX-7 FC3S
The New OS Giken STR series can handle up to 550hp, yet retains drivability very close to standard with 30% lighter pedal effort than most multi-plate clutches. By using special new plate and diaphragm designs, OS Giken has achieved ample power handling with just 715kg clamping pressure. This makes the STR series perfect for everyday driving applications, along with most race and drift applications. For drag racing applications, please refer to our competition twin plate line-up.The clutches come complete with lightweight chrome-moly flywheel, ruby red-anodised billet aluminium clutch cover and the required bearing/carrier set or pull-push converter kit where required.Clutch kit includes front cover and carrier. Application List* Mazda RX-7 FC3SModel/EngineTypePressure PlateMaterialNotes:F/W (kgs.)Assy (kgs.)RX7 FC3SAluminum35.1011.1013BTPressed Steel 5.1011.25*GenuineMazda counter weight and 6 bolts are needed to install either of above. Use genuine counter weight of pn: N327-11-521A, and bolts of pn: 8051-27-236 (or 8501-27-235) for chassis No. 0 thru 200000 (before minorchange). Use genuinecounter weight of pn: N351-11-521, and bolts of pn: 8051-27-236 (or8501-27-235) for chassis No. 200001 and on (after minor change).OPTIONALPARTS: Adjustable fork kit (returns release fork to the position with the spring) RX7 FD3SAluminum 5.1011.1013BTPressed Steel 5.1011.25*GenuineMazda counter weight and 6 bolts are needed to install either of above. Use geniunecounter weight of part pn: N351-11-521 and bolts of pn: 8051-27-236 (or8051-27-235) RoadstarNA6CE, NA8CAluminum 4.20102.00B6, BP8Pressed Steel 4.2010.35 OS Giken Note Key:1 – Need genuine flywheel bolts.2 – In order to improve engine response, diameter of the clutch is set at 215mm.3 – Specify N/V and code of vehicle upon ordering. The kit can vary depending on the production period.4 – In ordre to improve engine response the clutch disk is set at 204mm.
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