to those who have done the a2 swap.

[chunky]

Was the spline count the same for the k20a2 & k20a3 transmissions?

Also, did you happen to check to see if the clutch spline count was the same?

I'm pretty sure that both parts are interchangeable between the k20a2 and the k20a3.

port? bioevolve?

[chunky]

never mind, I found my own answer.

the k20 transmissions all have the same spline pattern. but the spline pattern for the hub is different for the rsx type-s, it has a larger shaft & different spline count.

clutch is also interchangeable between all the k20 transmissions.