Spline count = 21 Peaks. (this is the same for the W40, W50, W55, W57, W58, R154)
The 2jz W58 input shaft has identical splines to any other W58 (and the shaft is also very very similar in my experience...the difference cannot be seen without removing the front bearing retainer).
The input is the same as the output.
Cheers
Wilbo
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