Hey i have a 2004 dodge with the 5.9L and there are no mods done to the truck yet. the printout i got when i ran the vin number and it says that i have the HO cummins motor. now im not sure how i find out if i have the 2004 or i see that some people call it a 2004.5 i dont know the differnce if some one could tell me it would be a big help.

Second, i have the automatic trans in the truck with a 3.73 axle ratio i get arround 17-22 mpg what are some basic mods that i can do to gain some mileage and not damage my transmission. i really dont pull with the truck so i know i never work it to its full potential.

 

sticker on the side of vavle cover will tell you you horse power rating, that will tell you your year.

 

sorry my bad: um 305 horse early 04 325 horse late 04 also no cat its an early if it has a kitty late 04, just in case you can't find the sticker

 

i just checked it out it says 325hp at 2900 rpm so what would that mean
it says model 02 03 04 though

 

oh i see it has a cat on it so with the 325 hp and the cat would indacate that it would be a 2004.5 correct?

 

yes it is an 04.5 as far has mpg i would do an air intake, ans a small milage tuner that won't hurt anything

 

ive been looking at the edge mileage max and a airaid intake can anyone tell me if those are good products or is there somthing better for me?

 

the milage max is good, as with air intakes its personal preferance. i went with a K&N and have had no problems at all. alot of people will bash the K&N. I would go with either K&N or AFE. Also get a straight through muffler or cut it out like i did.