- Joined
- August 4, 2003
- Messages
- 880
- Reaction score
- 2
- City, State
- SW Florida
- Year, Model & Trim Level
- 1999 Expedition XLT 4x4
do not go with a 3", stay no larger than the 2.5". And I would do a couple of things different if it were me. I would replace the cat with a hi-flo unit, and mandrel piping, also gone with a Hooker Aero Chamber muffler single in and 2.5" dual out to rolled SS 2.5" tips. Then you are sounding good. And if you have resonators, then throw them out. Weld everything, screw clamps.