The above link is 3" exhaust with 14" Dynomax ultraflo muffler. Sounds rather loud to me. check his other videos, he has done alot of research on diffrent mufflers.
3" will be a lot louder than a 2.5, or 2.25 for that matter, system.
I just got into a discussion with a coworker (Ford racer) on this exact topic and he swears up & down that in regards to sound the size of the exhaust system has virtually zero effect on volume, it only effects the tone. I told him he was nuts. He's bringing me before & after video to watch of his Mustang when it had 2.5" and now with 3". He claims I won't believe my ears and is insisting just as a tip to not waste money on larger exhaust for purposes of sound alone. I'll see soon enough.
