Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Hello my name is ***** ***** thank you for your question
When the manifold get red like that, it means there is a exhaust restriction. The flow pressure gets so restricted that it makes the manifold glow. Most commonly caused by a catt converter.
The exhaust will need to be checked for the restriction to reolve your issue.
If you have any more questions on this, please feel free to ask.
If not, and you are satisfied with my help please Rate me. I hope that I have provided you with excellent service.