I was recently checking out everything underneath my truck (07 ram 1500 4.7 flex)133,000 miles.I noticed that my exaust manifolds were rusty looking.Is this normal?

 

Yes. its surface rust from them being in the elements all the time. And the hot to cold heat cycles. If you live where they use salt on the roads it will happen faster.

 

Yeah, anything that gets that hot is sure to rust

 

yep, definitely normal. Did you check for any broken manifold bolts? If you haven't had to change any it's likely you might with that many miles and some good rust going on. It's a common problem for some of them to break off.

 

Thanks guys,Ill definitely get under truck this weekend and check the manifold bolts.