Re: O2 Sensor Question?
I just figured it out they have four. Two in front of the cats and two behind them.
2003 Ford Mustang 3.8L V6
Current Mods: SCT 4 Bank Chip, K&N CAI, 25% UDP, ZEX 75 Wet Shot, MSD 8.5mm Wires, Autolite XP Iridium Plugs, BBK Shorty Headers, Flowmaster Super 44 Muffler, 3.73 Rear Gear, Ford Racing T-Lok, 18x9 Saleen Chrome Rims Front, 18x10 Saleen Chrome Rims Rear w/Nitto 555R Drag Radials (Track).