If i get rid of my muffler and just use 4" straight pipe , how will that effect my truck and performance?

 

Right now I have no muffler on my 1994 Dodge Ram 2500 Cummins and I never bought it with one. I Have never really looked for MPG on my truck going from a 1996 5L Ford F-150(Anything will have a better MPG) but I dont think removing the muffler will eat more fuel or at least eat enough for you to notice a difference. I have 3" straight pipe coming out the side so 4" might be different. Hope someone that has a 4" has some better imput but best of luck.

 

bought my 07 cummins brand spankin new and right down and had everything whooped off and run straight pipe and get between 18.5 and 21 mpg intill i added 35 inch tires lol

 

I am running straight pipe right now also. I took the cat and the muffler off not long after I got the truck, and it sounds like a beast (which the wife don't like). You might see a slight boost in performance, but nothing huge. The main thing will be the sound. Be warned that will get some pretty nasty drone, especially if you ever pull anything.

 

well im going to get rid of the muffler as soon as i have time, i want it to sound louder. its not going to give me a headache when pulling a trailer is it?