I was just curious, hypothetically if we could just throw any turbo 4 into the backs of our MR2's which company makes the best turbo4? the 3sgte,4g63,ej20 and sr20det are all 2.0 turbo 4cylinders, all of them bred for rally racing, well Im not sure about the sr20, but all of them seem to have the ability to create lots of hp, and have attained 200,000+ on the odometer when maintained well. Which brand makes the best turbo 4 over all? i hear subaru's are hard to work on, like you have to dynotune everytime you put a part on, 7bolt 4g63's crankwalk, dont know any draw backs to the 3sgte or sr20det but maybe cuz I just dont know much about these engines, I grew up on 4g63's. discuss.