My 2008 XWD V6 exhaust sound at wide-open throttle is less than satisfactory. Today, I've secured a used stock exhaust from a 2011 4-cyl XWD with around 20K miles. My idea was to install this one on the car for regular duty, and modify the older unit from 2008 and 80k miles (the one that sounds bad at WOT). I would open the rear cans, gut the innards, reweld the cans, and go lapping. Swapping the units is easy, one collar to remove at the flexpipe at the front, and unhook the 4 rubber mounts at the cans and that's it.
Now, are the 4-cyl mufflers different from the V6's? They have different part numbers but they look identical from the outside.
Another option is to remove the old cans and weld in some glasspacks or sport mufflers from Dynomax or the likes.
Noise level is not a problem, as this sport exhaust will only see track duty... A nicer sound quality is my goal... And that goal is something rich and deep and sporty, a bit like the sound my ex urQuattro did... By the way, this car had a stock Audi exhaust, and when I opened the OEM muffler after 29 years, it was in really good shape and inside I just found a perforated y-pipe with some glass fiber around it. So it was in fact a straight through muffler with twin exits. There was nothing else on that exhaust, just that rear muffler.
What would you do?
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