Mercedes-Benz Suspension Applications || H&R Special Springs, LP

(W)170 chassis...waaaaay at the bottom of the page.

Would these be a fit for Crossfires? I understand that most of the suspension parts are a direct fit, but are the R170 chassis/suspension connections the same too?

And are these bigger than stock for the OEM N/A?

Is the SRT-6 interchangeable (fit-wise) with the N/A?

Whatcha' think?