Not a race, but a kill depending on your personal taste
A friend of mine has a new Borla system on his V8 GXP. He assured me that his car sounded meaner than my 3800 with DynoMax Mufflers. (at idle)
He knows I have a small cam & I tried explaining to him that the E85 made my V6 sound beastly. He didn't believe me... so we battled. End of the day it was all in good fun. Just friendly competition
You be the judge
YouTube - ‪V8 Grand Prix Vs cammed V6 Grand prix Exhaust‬‏