[Walkurie]

It's basically the same as the CSL airbox. Neither use the original MAF sensor. Several of us are using the RPI scoop, as the intake is almost touching and lines up with the radiator bulkhead. It comes with no decal, of course, but one can be easily added. The tune provided by Evolve is a bit different than the BMW tune. The air temp drops about 2 degrees F. vs. an aFe intake, and maybe as much as 5 degrees or more over the stock Z4M airbox. The intake sound is nearly identical.

Z4M's were never included in the CSL program, so not sure if a stock E46 CSL 'box can be adapted and if it can, what is involved in the tune. The Evolve system is pretty much drop-in. No codes. Hope this helps.