Difference Between 04 And 04.5
 

i was wandering around the "car wars" lot today and was wondering about the differences and how to tell.

thanks
dave

to tell the difference of the two is by a couple of ways. The 04.5 had a CAT and the 04 doesn't. Also the 04.5 is rated for 325 HP and 600 ftLB. The 04 was rated for 305HP and 555 ftLB. There are also other differences in programming, injectors, and exhaust size. Hope this helps.

cool. thanks.

Rear axle size? Didn't it increase from 10.5" to 11.5" AAM?

i'm just curious about how to identify them on the lot. the 305/325 will be the easiest for me.

Look at the sticker on the valve cover under hp rating if it's 305 it's an 04 if it's 325 it's the 04.5. Hope this helps.

Rear axle size? Didn't it increase from 10.5" to 11.5" AAM?

the 04's already had 11.5 rear

Some of the early automatic 03s had 10.5s, all the HOs had 11.5s...

steved

I'm not too sure about the axle size... I think that was just an option. I could be wrong, I have just never heard of that before. The 04 had a mechanical waste gate, the 04.5 has an electronic one.

And any one w/the dodge ram emblem in the center of the tailgate is an '05, right? Or did the '04.5s also have the emblem in the center of the tailgate?

Yeah, the center emblem came out in 05. I have one on mine, but that's just because a pine tree rear-ended me and I had to get a new one...

04 3" ex. 04.5 factory 4" exh.

04 has a 3.5 inch exhaust pipe from the turbo to the muffler, 4" from the muffler to tail pipe.

04.5 is 4 inch turbo to tail pipe

I believe the turbo on the 4.5 is also different than 04 came with.

04.5 has a cat???I thought that thing was a resonator...oh well. :psst:

My 041/2 had a cat hummm its mia i guess. Ya i thought it was a resonator too.:duh3: