But of course all the "experts" chime in with "facts" to tell him what an idiot he is. More often than not the case on vw and bmw forums. Most of whom don't know the first thing about cars, just the drivel they've read since coming to the board, which being mostly wrong of course armed them with inaccurate info and a few buzz words they can throw around to make their case seem a bit more convincing.
Yes man, getting rid of the restrictive cats will increase flow and therefor power. More flow you demand of the stock system the greater the gains, so a stock car will not gain as much as a "tuned" car but there are still gains. Read up on performance turbo charging, don't look to brand or car specific internet forums for your answers, at best you'll end up with info that's heavily colored by the persons brand allegiance and limited knowledge and at worst you can ruin your car following the advice.
That said, a tune+dp is the min you should do to these cars.
