Bigjohn4300 Posted February 19, 2017 Share Posted February 19, 2017 2004 granite AI300, getting ready to change the exhaust manifold gasket. I've read on here that the AI motors use a smaller more restrictive (maybe for more back pressure for the AI EGR dual bump cam?) manifold and that replacing it with a non-AI manifold reduces oil sooting and helps exhaust flow (bigger injectors coming!) does anyone know what part number I should buy for this? Quote Link to comment Share on other sites More sharing options...
Bigjohn4300 Posted February 19, 2017 Author Share Posted February 19, 2017 Btw I might not have fully explained, since imma have the manifold off for gasket change, ideal time to change to non AI exhaust manifold right? Quote Link to comment Share on other sites More sharing options...
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