ok so i have 2 turbo's right now. 1 is a strait t3 .60/.63 ar. not sure of trim. i also have a ebay t3/t4 50 trim. just a typical ebay turbo. the exhaust turbine on the ebay one is shot. all the fins are fucked. i was wondering if can use the exhaust wheel from the t3 with the compressor wheel of the t3/t4 to make 1 larger turbo. i am tired of the t3 not producing power in the upper rpms. how difficult is this to do? any help would be appreciated.