So it took forever ,to take off the exhaust down pipe and flex coupling, when i took my starter off. The Pipe was rusted but in decent shape. And and I was thinking how much easier it would be just to hook up a section of the flex exhaust pipe inbetween the turbo charger to the exhaust tailpipe. Is there a reason i shouldn't do this?

Huh Its kind of hard to understand what you are trying to ask when there is no punctuation in a sentence maybe you could rephrase it it would make it more likely to get the answer you are looking for.