04 zf?

[325bob]

Will my 03 ZF 6speed & flywheel (Z4) bolt up to a 2016 M3 block?

[bmwdirtracer]

I'd highly doubt it; there's no reason it should. To the best of my knowledge, the two engines have almost nothing in common. AND, that ZF gearbox is nowhere near strong enough to take the torque anyway.

I admit, I have no first hand knowledge of such an attempted joining, but it seems ill-conceived.

[BimmerBreaker]

No, it will not fit