ATS 3 piece mainfold
#4
Yeah thats what i was going to say is the difference. You might be able to have a machine shop machine it out for you, but by the time you get that done, you would probably have been better off to buy a new one specifically for the 12 valve. Not only that I dont think you could machine it enough to match the ports up properly without having it cause reliability issues, such as cracking the manifold. That would be my hypothesis.
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cummins1999
24 Valve 2nd Gen Dodge Cummins 98.5-02
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06-26-2015 01:56 AM