Originally Posted by timeXlost
gutting them will result in a loss of power. introducing fuel to them will simply clog them and result in a loss of power. the erratic flow of the open chambers will cause changes back pressures. its bad. pull them out and put in test pipes.
I think the issue here is that even simple test pipes for the 2.7 twin turbo are obscenely expensive. And not many companies make them.
I know APR makes Audi downpipe systems, but the last time I checked they were around $1500.