ZF S5D 310Z / S5D 320Z Short Ratio Synchromesh Gearbox
ZF S5D 310Z and S5D 320Z short-ratio synchromesh gearbox
Short-ratio converted ZF S5D gearbox. Designed for scircuit, rally and competition use while remaining street-friendly due to retained synchromesh. Adjusted gear ratio allow for very short rpm drop from in 3, 4 and 5 gears to keep the engine in the peak power range.
Uprated gearing stack also provides much faster shifting with positive gear engagement.
Designed for BMW S and M series 6 cylinder engines with aftermarket camshafts
Gear ratios
I – 2.94
II – 1.74
III – 1.37
IV 1.16
V 1.0
Core exchange required





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