07 V8 Exhaust Manifold Clicking / Replacement Questions

shinsain

New member
Hi all, I recently (a few months ago) bought an 07 T4R with 43k on it after selling my FJC a few weeks prior. I brought it home after test driving it and the next few days I noticed what I thought was just (hopefully) an exhaust leak until I started doing some more reading (thanks internets!).

So I'm now at the point where I've had it looked at and not only is the passenger's side exhaust manifold definitely cracked, but I think at this point the driver's side is as well -- not to mention the rest of the exhaust looks like shit too and has some other issues (East Coast car, unfortunately).

To fix the problems would have been anywhere from $600-$1000 depending on what was wrong, got multiple estimates. Since I think both manifolds are probably junk, I've been looking at simply replacing both exhaust manifolds as well as the cat back. This is after some searching. It seems new aftermarket exhaust parts can be had relatively cheaply. It will be only a bit more to replace everything as opposed to fixing the already broke stuff.

So...I wanted to get some feedback on the parts I'm looking at ordering, and/or take suggestions on other manufacturers. I want to have decent quality replacements, but I'm not necessarily looking to upgrade performance per se. I'm also not looking to break the bank. Here's what I've got so far:

Dorman exhaust manifolds (from Partsgeek

Gibson catback exhaust from Summit Racing

FYI, I'm not sure if that's the right exhaust for the V8 full time 4WD, but that's the maker I'm looking at.

Any suggestions, comments?

Aaron
 
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The problem is OEM or OEM copied manifolds will eventually crack again. I know it is spendy but I did the Thorley headers and am very happy with the results.
 
See, that was one of my questions, was whether it was only OEM, or any OEM copy as well.

So it's a design flaw, not a materials/workmanship flaw?

Also, damn...the Thorleys don't even have a stinkin cat attached to them. No kidding about price.
 
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I am interested in the headers as well. I have been reading up, but have not found an answer to one question.

What about the CATS? If i put in the thorley headers what about the CAT that is attached to the manifold?

Thanks!
 
I am interested in the headers as well. I have been reading up, but have not found an answer to one question.

What about the CATS? If i put in the thorley headers what about the CAT that is attached to the manifold?

Thanks!

That's where more install money comes from, cat will have to be welded to the headers.
 
Even if the issue of fracked manifolds is present in the OEM-copy manifolds, it would still be years before they showed any signs of cracking, correct?
 

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