What's the difference between the BEP 9cm HY35 housing and the 9cm housing that comes on the HY35 already? I've never seen a BEP T3 flanged Holset housing at all, they don't list them on their site either.
http://www.bullseyepower.com/u_turbine_housings.asp
I just bought an HY35 to replace my HX35 (divided 12cm) because I wanted earlier spool. Not sure what the difference will be. I'm datalogging before and after (boost, rpm, afr, IAT) so I guess we'll see.
I like the HX35... when it's spooled. It's got too much lag for my tastes. I'm used to small turbos. If the HY35 doesn't do it for me, I'm going to swap to a T3/T4 that will.