The exhaust system is going to be custom built as the MR2 exhaust system will not bolt up to the 20v header. I will be using the stock 20v header with a custom 2.25 mandrel bent exhaust. No flex pipe is needed as it is built into the 20v header. Pics of the piping and the finished exhaust will be up soon.
Exhaust came out well with lots of help from Rick Blair and is as described above.