So I'm wanting to put some pipes on my truck here in the next month. I'm stuck on what to get. Stacks are out of the question as I cant spare any of my bed room to them and I dont want to mess them up loading stuff there. I want to run straight pipes from turbo back. The truck is a 2001 2500 quad cab swb 2x4. It's my daily for now so no real power boosters are going to go on. Mostly pipes cold air intake 80 hp injectors and maybe a airdog. But back to the question 4" or 5" straight pipes any help would be great I just want it to be LOUD! Thanks!

 

I don't regret putting a 5" on my 00. My theory was get a exhaust put on that would sastify my needs till it rusted off. The only disadvantage with a 5" system was a lack of mufflers when needed how ever that has improved in the past couple years

 

4" or 5", I suggest some sort of muffler to reduce cab drone. It is super annoying on a road trip. I went with a 5" MBRP kit with muffler, and really like it. It was still loud out the pipe, but decent in the cab.

 

I like my 5" diamond eye on my 01, and I like my 4" MBRP in the stroke, but would recommend an mbrp system over the diamond eye, just on the ease of installation, and like RAWilliams said you want some sort of a muffler, not much of one, but something that will kill that in cab drone. my diamond eye mufflet is really just a fat spot in the pipe, and the mbrp muffler is directional, one direction it is more like a muffler than it is if you put it in the other direction. Both trucks are quite loud, and I saw a substantial increase in torque with both of them as well.