you are correct. Aesthetically the turbos are identical. but the wheel and center sections vary just enough to make a big difference.
on a 2.3 stroked evo we make a peak of 650 AWHP on the AMS GT35R kit
on that same evo with an AMS 37R kit we made 710 whp at that same boost level. the 37R will spool about 400 rpm later though.
The biggest problem now is availability. We recieved about 15 of these guys in and they were gone within 2 days. I am not slated to get another shipment in till late 2006.
Eric
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