I have an '03 ram with the 4.7. I have tried searching the threads for my answer. I am thinking of deleting my muffler with a straight pipe since there or no emissions in my state. I cant remember but would this create negative back pressure?
No issue on the 3rd gens what so ever. Are you keeping the cats or gutting/removing them too? If you do gut/delete them then you'll need a custom tune, which can be an issue with the '03.
No I am not doing anything with the cats. Just looking to free up a little hp. Will the sound be very loud? When I have the $$$ I will put in a nice aftermarket muffler. Ê