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 https://www.bigmacktrucks.com/topic/48800-ai-to-etech-exhaust-manifold/ 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 https://www.bigmacktrucks.com/topic/48800-ai-to-etech-exhaust-manifold/#findComment-362079 Share on other sites More sharing options...
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