Our stock compressor dia is 60mm, it looks like these are extended 5mm. So machining is probably required to make the compressor housing fit.
There is another billet wheel listed that looks like it's the same wheel through a different seller. The extend tip diameter number look swapped around but otherwise the same.
http://www.ebay.com/itm/Billet-Turbo...FV47k4&vxp=mtr
I'm running PURE TURBO stage 1 upgrades and didn't have any issues running on the stock tune. Working with BPM motor sports to get a tune for the upgraded turbos.
The limit on our engines is the the MAP sensor only reads to 22-23psi. Most tunes run 20 psi on the stock turbo because it runs out of breath on the topend. Looks like that will be the first limit we'll run into with upgraded turbos. Which will be a problem because nobody wants to support rescaling the pressure map for the 4 bar map sensor newer BMWs use. I asked. Fuel will probably be next after that.