I have a question. I am going to replace the plenum pan on my 96 dodge ram 1500 5.9 liter I was looking at getting the intake air modification kit where you cut out two inches of the vains in the intake to increase horse power and torque. My question is if i do that will I loose gas mileage or will it increase it or will it stay the same? Does anyone know

 

Is this what you are referring to?

https://dodgeforum.com/forum/2nd-gen...egger-mod.html

There's a few that have done it, and I don't remember hearing anything about a lose of mileage. If you do a nice tune up while doing the plenum (cap, rotor, plugs, wires, timing chain, etc...) you MIGHT gain a mile or two...

 

i think i remember reading that cutting the runners would decrease the torque and increase the hp a tiny bit which i think could help you get better gas mileage if you do lots of highway driving but if you do enough city driving it could probably hurt mileage.

 

Cutting the runners just moves the power band up a couple hundred RPM. That's it. If you get a bit more power out of it, you won't notice it.