Opps, I missed this post... :) OK I'm dumb...Sorry Ryan..My bad...
Mines running a GT2860RS too, but I added a Tial turbine housing (& external watsegate) and billett compressor wheel...I have a GT2871R but to much lag for a circuit car...I'm not doing 24hrs, but thinking about IPRA and the restrictor make anything bigger than a GT2860 useless anyway!! :(
I'll get back to you on the wheels....But very interested...