What exact exhaust an dcomponents should I get to get this sound?
http://www.youtube.com/watch?v=4b311ym5K2Y
Also, is it possible to fit different tips on it? somethinng simmilar to stock but slightly bigger?
Learn from my thousands of dollars of S5 exhaust experience....
First, go to a decent exhaust specialist and ask them to remove your rear resonator and replace with a couple of pipes. IMO this will give you a beefy exhaust note.
If this isn't enough then..
Second, go back to the same exhaust specialist and fit new mufflers, at this time you'll be able to choose any kind of tip configuration you like
To be honest the whole branded exhaust system sound can be achieved by most experienced exhaust shops. Please don't waste your money like I did on an MTM system.
By the way, I'm not bagging the branded exhaust manufacturers just offering alternative advice.