Originally posted by tbarney:
I've have a P0420 that keeps poping up after I clear it so based on what I've read here the precats are probably bad. 80k is long behind me so no luck on the warranty. Alternatives seem to be: 1: myster mod, 2: new precats, or 3: MSDS headers. If there other cheap alternatives please let me know.

My real question... Do the new headers come with new precats, or are the precats eliminated with the new headers ? If new headers will most likely solve my problem then I think that would be the way to go since precats will cost a few hundred, I might as well spend a few extra dollars and get the performance boost.

Thanks,
Tom



Or if you don't want to replace the headers you could try a new sensor first.

1999 Cougar V6 MTX SVT UIM/LIM/65mm TB, I/H/E, Fidanza/SPEC III/Torsen, Koni/GC's, 19" Icon wheels w/ Pirelli rubber, NX Wet Kit