I have a TurboXs Uni-chip ECU engunemanagment. Right now it is set for stage 2 or 2.5. I think the only difference for 2.5 is the downpipe, which is what I had. Anyways you can check the specs on it at www.turboxs.com . It comes with the TurbXs MBC too. The ECU is great, but I am getting rid of it cause I have no WRX anymore. Got an STI now, so if you are interested you can email me at Cwrinkles75@yahoo.com or you can pm me. I am askin $450 obo