Okay so I been crawling underneath my truck and having my step dad give it a little gas to get it to rattle. Up front engine sounds quiet as ever but the rear of it is noisy. So I crawl under by the cats. I don't really hear anything hitting the sides. But does sound like its echoing through them.
http://i654.photobucket.com/albums/u...929C08972D.mp4
http://i654.photobucket.com/albums/u...954C76F509.mp4
http://i654.photobucket.com/albums/u...42BFE82543.mp4

 

Any small white granular pieces making their way out of the exhaust? Rap on the gas kinda hard and see what happens.

 

Don't know if you have a bad cat...but the first video your truck sounds like mine...with the rattle that sounds like a lifter around #5 cylinder...probably around 900rpm...

 

Well I watched a few videos off exhaust manifold leaks... Sounds just like my truck. So bad manifold or broken stud. Ill check when I get in

 

My motors quiet on top but the bottom is Loud.

 

How many miles ???

 

83,000, it is the exhaust. So I'm not worried about it till next month

 

It might be covered under emmisions warranty

 

Not at 83k - the emissions warranty is 80k.

 

Besides that I'm getting long tube headers and what not. Screw factory haha