Yeah....
IF they get an extra 100hp.
That's a compressor of a merc slk200 kompressor (and clk), and is best sized for a 2L engine or so. That won't cope with a 3 liter and certainly not an extra 100hp. Most other tuners use a compressor that has about twice the displacement.
The m65 (it's actually an eaton m45) does about 100m³-300m³/hr with a 1.2-1.5 compression ratio at 65% efficiency. A 3 liter engine needs 585m³/hr at 6500rpm (no loss of air friction etc included!, but calculated at 100% fill). At that time the m65 operates below 45% efficiency, and is probably ratteling apart (you'd have to spin it at about 3 times the speed it spins in the merc

). Any idea how hot this thing is going to get? (and with no intercooler..)
So this compressor is far too small imho. The efficiency sweet spot is nice at 1.4 ratio (so it is a useable design), but this is very clearly a compressor for a 2 liter engine tops with a fairly low revline.
Mercedes used these on a 1,8L engine with 163hp @5500rpm. These are nice engines and pretty easy to bump to about 220hp (smaller pulley), but that's about it. And that is what they do good (OEM quality), and this compressor is ideally tuned for that engine (needs 300m³/hr for 5500rpm at 100% fill)
But no way that it can bump 100HP(!) on a 3.0L 231HP (@5900rpm) engine, let alone an S54.
This is a unit that is popular to boost an mx5 or a corrado g60.
Not having a finished picture isn't much reassuring either. And both the z4 m54 ECU (ms45) as the z4m ecu (mss70) are not easy to tune right. Lots of experienced tuners (VF, ESS, AA) have trouble tuning these right without quirks (AA doesn't even do these ecu's on boost)