Has there been any recorded gains on a stock S with a Borla exhaust? Any dyno sheets? I've searched and the borla seems to be one of the least known exhaust. Also for you Borla owners, any known problems with it? Getting louder of the years? The fiberglass packing breaking down, rust, fitment? Thanks

 

I dont own a borla cat back. I just cut off my stock mufflers and put 2 borla mufflers in place.

I didnt really notice much difference but I really like the sound. I believe it uses steel packing not fiberglass.