well as far as turbo kits its also clearance and the way the fuel system works i naddition to the ECU problem mentioned above. The SR motor line is gone from our shores except in the G20 which is a shame since, as far as I feel, is better than the QR25de. While engines share the same code differances in cams, fuel delivery, and computers differ. the ecu could become easy to over come with just a swap to a free standing or after market ecu. This would include putting new sensors and new harness, very hard.