[jric52dt]

do any of you guys that got flow master mufflers ever hear a rattling noise when it idling or changing gears because mine has been making one it seems like where the muffler is or back near the tail pipe cant really tell. also i will put a video up of it once it dry here so i dont ruin my new camera

[jric52dt]

also i forgot to add it didn't do this since i got it. it has just happened recently i say in the past 2 to 3 weeks and i got them on in about early october

[crzyhorse11]

you may try a loose mount some where engine or tranny although with your gear noise id try the tranny first

[jric52dt]

i dont think it the tranny cause the car does it when it idles still but im not too sure if the flowmatsers mufflers are supposed to make this rattle after a while or if a hanger might loose.

[crzyhorse11]

well if u suspect exhaust check your hangers the flow 40s i had didnt rattle is it a cat back or a weld in maybe there is a lose bolt and the tranny will still make noise if you have a lose mount at idle atleast on a manual i know from experience hell may as well check it all never a bad idea to check mounts and u bolts and stuff make sure they are tight

[heavy metal]

I have run across alot of rattling Flowmasters.The baffles come loose on the inside.

[SVT1995]

It could be a lose hanger.

But on the other hand my flows are starting to sound like they are rattling abit in the muffler. They didnt do that until I got the o/r x on the car along with the longtubes. I dont know if it had anything to do with it. I know the x will make it raspy but this sounds different.

[racin366]

If you have an offroad x-pipe there is a resonance issue that can make it sound like a rattle, it has to do with frequency cancellation (or lack of it) of chambered mufflers with an x-pipe. You should also look for a loose heat shield or hanger. I've had flows on a few different cars over the years and never had any wear out, but that doesn't mean its impossible.

[jric52dt]

well i would want to take it to the dealer but will having different mufflers wielded in void my warranty?

[heavy metal]

Mufflers will not void your warranty.

[jric52dt]

o ok good well i should take it in then cause i know it def not the norm because when i had change in the change holder it was rattling and that never happened before