Ended up getting the sr20 turbo for 125. Considered waiting and getting something on zilvia, but I wanted to get something local that I could look at and check the shaft play on. Didn't want to get burnt on something that got shipped but turned out to be junk when it arrived.
The exhaust side of the turbine is different and will not bolt up the megan racing downpipe (6 bolt connection on the turbo side vs. 3 bolt connection on the downpipe side). This was also the case with the dsm turbos i looked at (5 bolt) so I knew I wouldn't be able to get it to bolt up directly. They do sell 6 bolt to v-band adapters that will bolt up to the sr20 and I plan on going this route as I cannot for whatever reason find a 6 bolt to 3 bolt adapter flange that will bolt up directly to the megan racing downpipe. Was considering getting another downpipe, but the only inexpensive replacement I can find that will fit a Miata is an OBX with a 5 bolt connection to turbine exhaust. The are no cheaper downpipes with 6 bolt connections that I could find. This means I have to:
1) Adapt the megan racing downpipe to fit a v-band flange setup.
2) Spend $$ for a decent downpipe
I have not purchased a manifold yet, but I believe the turbo will bolt up as it is a t25 (yes I did take measurments to confirm) and the fm manifold is advertised as having a t2 flange.
The biggest concern I have is fitting the intercooler. I've been basing my plan on this thread: 99/00 Intercooler with AC/PS
. I do plan to get rid of the maf and use both a iat and maf in replacement so this should free up some room on the turbo side.