[postal]

"Is there any reason why I couldn't use a TH elbow from a GN if I just used the flange and cut off the bend and remade it? "

you would be destroying a pipe you could sell for good money just to get a flange and puck. I dont think you would wind up using enough of the Houston pipe to come out very good on it. I think you would be better off selling it and using the money to cover the cost of fabing your new TTA pipe.


"Also How hard is it to just go to an external wastegate? Then it wouldn't matter? Right?"

Its easy and simple to set up an external waste gate. You obviously have some tools and knowledge if you're considering making your own down pipe. You will find that setting it up for an external waste gate will be a snap and you will laugh at anyone who said a flapper style would have been easier. I set up an external waste gate on my x-over pipe in my TTA. It was VERY EASY to do. Once this is done the down pipe itself because simpler and easier to make also.

So if you want YOUR QUESTION answered: "NO its not hard to do at all, infact its pretty damn simple."

I'll now step back and let the resident yoo yangs continue to make asses out of themselfs in the eyes of anyone who has knowledge of the subject and knows the answere to your question.

good luck with your project.

Jason