Despite this forum being more or less dead..
Today I replaced my OE exhaust on the K12S with the exhaust of the K13S. Looks much better than the stock howitzer in my opinion, and it is a cheap upgrade. I just wanted a cleaner look, not noise.
I had to cut down the heat shield by about 1.5", but I was able to make it fit pretty nicely.
Sound is way deeper and really aggressive rumbling on idle (a bit Akrapovic like) and a little bit louder, but gets closer to stock as rpms rise. Not a bad combination to me.
Oh, and it is about 10lbs less weight over stock.
