Originally Posted by Boosted Performance

I could make something to work with the F.I exhaust. It would look something like this (very crude drawing in pain, but you get the idea)



I would recirculate the wastegate after the converters, because this would allow for optimal flow. During normal driving all the exhaust would go through the converters, but when you open it up, a lot of it would bypass them, and go straight out the back. The oxygen sensors can be placed on the other side of the wastegate recirc, so they would only see exhaust gases that went through the converters. So, the converters would only handle the exhaust gas that goes through the turbine when in boost, and you get the best of both worlds.