My right hand side exhaust manifold on my frontier cracked at 90,000 miles and I replaced it. Now weeks later it sounds like my left hand side manifold is cracked too. Anybody know of any issues with the stock manifolds being faulty. This seems unusual to me. The truck runs relatively cool, never overheated. Any suggestions are appreciated..

 

It is definitely a common problem..... a lot of guys decides to go withheaders after their manifold cracks.

 

well, you have to replace both Nissan exhaust manifolds in your vehicle because it seems that both of it needs replacement.and let your vehicle be checked regularly.