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The OS Giken OS-88 gearbox is a sequential 6-speed gearbox designed to suit the BNR32 and BCNR33 GT-R.
It can also be used in the BNR34 but will require an R33 transfer case and front prop shaft.
It bolts up to the Nissan transfer case and has a bellhousing to suit any RB engine.
It also comes complete with shifter, digital shift indicator and pull-up reverse lock-out sleeve.
OS Giken designed this sequential gearbox to handle 1500hp, while retaining quiet helical-cut gears.
To do this the gear axis has been increased to 88mm, while most internal parts are forged.
The dog-engagement of the gears allows extremely fast shifting operation.This gearbox comes with the following gear ratios:
Instruction for BNR34.