without cutting, the rear subframe has to be dropped. I don't think you'll find a removed OEM CBE that isn't cut. Cutting isn't bad, I used an angle grinder with a cutting wheel and cut where it bends up to go over the subframe.
also, those blue rear springs are a little lighter blue than my cobbs, they might be roadmagnets, if i remember right, the roadmagnets drop the car a little lower in the rear.
I have been running SenSen Mazda5 shocks on Cobb springs for a bit now, they work great (even if they are cheap Chinese made). They are a little firmer than OEM and not much $$$. There is a thread about them on here, the vendor is APX auto.
I don't think it will...however, you could make it work, I made it fit on a CX7, which I believe uses the same style airbox as the speed6...just need some extra hose and a 90 degree pvc elbow.