Mfactory

MF-TRS-02B47

Synchrotech® Mfactory Honda Acura 4.71 ratio Final Drive Gear set - with case ID S80 Y80 YS1 Y21 S21 S4C (10 bolt 109.8mm ring gear hole)

Differential Rings & Pinions

Included in this set: 4.71-1 Ring gear and Countershaft that are a direct replacement for the OEM Set. This kit has everything you need to upgrade your USDM B16 Hydro to the Hi Performance 4.71-1 ratio. Changing your final drive to a performance ratio will increase RPM and provide better acceleration. Fitting: B series Hydro Transmissions with the "Small" 109MM diameter ring gear hole. Please let us know if you have any questions regarding fitment for your transmission and we will be happy to help you.

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