I'm getting this weird ticking sound out of my Magnaflow 18" when I rev it up in the cold. After I drive it around for a while it disappears but for the first few minutes after a cold start and higher rpm's it ticks (rattles). Will this go away after a while? I've had this installed for about 3 weeks now. Anyone else have this issue?

EDIT: It's not the mounting of the muffler... it's something inside the muffler... should I take it back to the shop?

 

sounds like something is loose inside.... i sold my magna recently... something was in it too..... i never noticed the rattle... but you could here something if you shook it... actually all the muffler i have ever had off the car did that....

 

Well i have had the same problem with the rattleing noise when its cold but ones it warms up it doesnt do it. i had a magnaflow and it did it and then i changed it 2 a 40 series flowmaster and it still does it. well icant help you with that but hopefully some one could help us both because im having the same problem on my tacoma 3.4

 

I don't mind it too much to be honest with you because like you said, once it warms up it goes away. I just wanted to make sure it's not something messed up with my muffler. If this is common than I won't have a second thought about it again. Thanks.