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Discussion Starter · #1 ·
Will putting a 4" turbo back exhaust system with cat delete through a CEL?
 

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Discussion Starter · #3 ·
That was what I was hoping to hear. The reason I asked was because the guy at the local exhaust shop stated I would through a CEL because the system would not have enough back pressure. And the EGR would not function properly, resulting in a CEL.
 
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