I have a 2007 dodge 2500 5.7 and was wondering about a throttle body spacer for a little more gain in mpg. Please tell me if they work and if they do, tell me the brand it is.THANKS.

 

Nope, they don't work on our newer trucks/engines.

Here's a good read:
https://dodgeforum.com/forum/2nd-gen...-not-work.html

I know its in the 2nd gen section and only really mentions the older Magnum 5.2L/5.9L engines, but your engine is even newer, so the same reasoning applies to the 4.7/5.7.

I will move this to the 3rd gen section (2002-2008 Rams) for you.

 

Yeah, I have never seen anyone come back with positive feedback or factual numbers with one on

 

The only thing they do is make more noise

 

For our trucks: throttle body spacer=paper weight

 

They work well (removing money from your bank account).