Those stock manifolds are covered under the emissions warranty. I think it's 8yrs/80,000. That information was provided by a member named Nissanmike who works at Nissan.
do i need a new tune?
My 04 titan has cracked manifolds and the dealer wont do anything (over on miles) so I have to get some headers, but I have read on here that if I do headers and a cold air intake the truck will run lean and I would have to get tuned. Is this true?
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