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blnagel 05-22-2005, 06:24 PM My friend just got a new 2004 CC/SB Cummins and he was wondering what the best upgrade/performance option would be? and the safest? He is just wanting it for better mileage. What do you suggest? Thanks Ben Andrew diesel 05-23-2005, 02:50 PM The first thing I would do is mod the intake or replace it entirely with an AFE. Next would be a free flowing muffler like a Donaldson or Nelson. I have a 31" Donaldson and it sounds very good. Those mods won't help much with mpg but will allow for use of a good chip which will help fuel economy. Beware that a chip can easily void warranty so be careful. Gauges should also be installed. gelecon 05-23-2005, 08:53 PM On my 2004.5 I had the computer re-flashed per a DC bulletin for "poor fuel economy" which will add 1-2 mpg per the bulletin and it did on mine. After I also added an Air Aid intake and modular intake tube to help things breathe a little easier. (The AFE is a little better filter from what I have heard and allows more air flow for engine modifications if you plan to make them). Other than that a mild re-programmer is about all that will help, but watch out for warranty issues if that is a concern. gelecon 05-23-2005, 08:56 PM Glad to hear your friend is still one after getting a cummins.:lol: This would not cause any competition between you two would it? :stirthepo blnagel 05-24-2005, 10:51 AM Glad to hear your friend is still one after getting a cummins.:lol: This would not cause any competition between you two would it? :stirthepo We are still friends. We just got back from a hunting trip and took my truck. Thanks guys. Ben 2001rcc 06-01-2005, 07:08 PM Hi, i'm a new dodge owner i have an 2001 what would a 4 inch Banks exhaust do for my truck and is it worth it? Banks clames it will improve milage 2-3 per gal and give 15 percent more power | ||