I recently had to replace my turbo on my 2wd saf. I had a T3 with a reworked compressor housing to 4x4 spec on it. I replaced it with one of the same spec but the car has lost its punch. I had the car on the rollers and I found the I have lost 30BHP. I think I have been sold a standard T3. Can anyone tell me what the difference is in the size of compressor housing between a 2wd T3 and the larger T3 from a 4x4