I had a question for you guys running these, as we have 2 cars both have these mufflers, the one car has broken 2 of them, I mean broken, like a piece of the spiral metal has broken and come loose. The other one is on a same basic car, except its a auto, and has not broken it yet.

Do you guys feel the stick is being the cause for this muffler to be breakin inside... Its not melting,, its breaking welds apart..

PS: The Auto is very custom and hits 7500 to 8000 rpm every shift, if you hold it to the floor, So I personally do not think the RPMs are the problem. What do you guys think about this?

Let me know if you need more data about the 2 cars and the mods they have......Thanks..very much...