so I just switched from the welded in Gibson WMA muffler to the Borla S. I figured no point in pics as its still the stock tips at this point. I switched to the borla b/c the wma had drone around 2k rpm, especially since I prefer to drive in sport mode so the truck isn't lugging around less than that a lot of the time. my thoughts are:
-the 2k drone is gone now with the borla.
-the wma was actually a deeper sound throughout the rpm band....good or band depending on preference.
-the borla does get louder when you step on it, and does sound more 'high performance.' I don't think id have interest in the ATAK model.
-the borla does get raspier than the wma at higher rpm....good or bad depending on preference. my f80 m3 with exhaust did the same thing..some like it, some don't.
-could be placebo, but I do feel like throttle response and sport mode shifts are both better with the borla.
-the borla product costs 10X the WMA muffler....that is a tough one but depends on your tolerance for a little drone here and there.
-so far I like the borla s and am getting happier with it, especially as it deepens with a few more miles on it. my friend though is pleased enough with my old wma as he just installed it on his screw, so I'm glad its not wasted.