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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Im running headers straight pipe to a side dump out my box, no mufflers no cats nothing and i have tons of power, im 3.5 inch piping from the header to mid cab then i have a 4 inch peice of pipe at 4.5 inch back down to 3.5 out before my right rear tire. Sounds mean and u get some good backfire, at least i do
stock single exhaust from the cat back is 3". If you get duals, better go 2.5 or possibly smaller. Most of the 1 in 2 out mufflers have 2.5" out with 3" in.