Well it's civil enough but still sounds like a fart machine IMO. My buddy would call me on the cell while driving, I couldn't hlep but laugh, you'd hear it like none other. I took my dad to a the ALMS race at Mid-ohio, he heard my buddies car and wanted to know if I was going to weed eater my TSX, umm not right now...

It just sounds aweful on a near $30k car, it got much better with the tip inserts.

What ever HP gains you see are completely overshadowed by the sound IMO. No thanks stock for me, please.