[J-Wat]

I think i said this before in another thread but i've never heard of an h2a8

of the other two it depends on if you want higher top speed or faster acceleration.

the m2s4 out of the 4th gen si gearing is...

1-3.307
2-1.857
3-1.320
4-1.034
5-0.812
FD-4.266

the m2f4 out of the 4th gen vtec gearing is...

1-3.307
2-1.950
3-1.360
4-1.071
5-0.870
FD-4.266

also if you want an lsd just get a quaife ATB diff and throw it in your trannyits about $1000 and will help deliver your turbo power to the ground