I had heard that this combo is not as loud as O/R h with Flows . That is not the case with my car. It is twice as loud as my 89 with BBK headers, offroad h and American Thunder catback. I almost got a ticket within 20 minutes of picking it up from the garage. Don't get me wrong it is loud and I love it. The only bad thing is now I have every ricer in town tring to race me.