PCT
2019 2500 6.4
- Joined
- May 9, 2014
- Posts
- 2,107
- Reaction score
- 475
- Location
- Northern California
- Ram Year
- 2019
- Engine
- 6.4
Back in March I change my exhaust around from the y-pipe 3 inch, to 2.5 inch parallel pipe, I have a true dual system with a flow master 50 series so I have 2.5 in 2.25 out. (Both side need to merge at one point after cats to pass CA Smog) In March I have noticed a drop in hwy fuel econ, I'm wondering if the lack of back pressure moved the torque curve out of the highway range there for causing my usable power to drop? maybe I don't know what I'm talking about, but I'm thinking of going from 2.5 to maybe 2, or 2.25 from the cats to the muffler.