I have an 06 gt, a couple of months ago i had a set of 40series flowmasters welded in. Lately i have noticed that they seem louder than when i first had them installed. Is it just me or are they actually getting louder?

 

They get louder and deeper as they break in, from what I've been told.

 

yes, thats true, at least it was for my Super 44's

 

I would have thought that they would get softer with age as your hearing goes away.

 

Same here...definitely louder the longer they are used. Got even more loud when I started throwing more air through them with the supercharger!

 

They do break in and get a bit louder but not by alot. This is the 4th vehicle i have put flowmasters on and i am very happy with them still. Remember as you get more used to a car the more you will notice the little things like noises and power changes as you get more comrortable with it.

 

when i put my thrush's on i was surprised with how quiet they were but a month later i was very pleased with the noise they let out

 

Its because the fibreglass packing gets compressed.

 

+5 on louder with age. Throw on a CAI to really wake em up.

 

(taking cover) I disagree. Ive had a set of american thunder flows for a year and a half. They are no louder or softer than the first day I installed them. I might be wrong, but Id be willing to bet that flowmasters are just chambered, they dont have "stuffing" inside of them. There is nothing to "break in". [8D]