- Joined
- Mar 15, 2008
- Messages
- 795
- Reaction score
- 7
- Points
- 0
- Age
- 38
- Location
- Marietta GA
- Vehicle Year
- 2001
- Make / Model
- Ford
- Engine Size
- 4.0 SOHC
- Transmission
- Automatic
how would removing the two main cats and replacing them with a magnaflow high flow on a 2001 4.0 affect the 02 sensors and engine performance? the final sensor is bettween the two main cats. i'd like to remove them to do a custom exhaust for better sound and performance while using a high flow to keep it legal and a flowmaster 40 with dual exits.