Bijou
Junior Member
I have an 06 5.7. Right know I got 40 series but looking to go with 10 series duel in/out 2.50. I want to get rid of the Y pipe so I'm thinking, running new pipes from the cats no Y pipe into a 10 series duel in/out. With duel in/out muffler do I need to have an X or H pipe? know I will loose backpressure but also going to get a hemifever custom tune and that should fix all them issues right?
