dfw

**Courtesy Flush** · 10-11-2012, 12:16 PM

Originally Posted by TrueStreetTim

I actually talked with my Ford guy this morning to get an O2 shipped. I asked if anything "funny" had been going on with O2's that he knew of. He said no. But then, for the first time, his system asked if the build date was (i think April 2010) or beyond. He said this was new. Perhaps something is developing and we just don't know what....yet.

Upon ordering i was told there was two 02 part #'s available under my vin #. Both specified as front 02's left and right. One was $120 other was close to $200.
Ill agree, something has developed.
I bought the $120 one it never worked. Took it to shop and they bought another $120 one and it worked. hmm

Originally Posted by TrueStreetTim

Same or different brand?

Lethal O/R X on the 11 car

SW LT's and o/r X on the 12.

**Toby** · 10-11-2012, 09:58 PM

Originally Posted by Steve

Knowing it would leave some HP on the table, but do the stock cats overheat if the stock midpipe is left in place?

Simply put, No they will be perfectly fine. Will they clog up faster, sure they will, you are cramming over twice the amount of air through them. The only advantage to swapping just the mid pipe would be to delete the cats. the factory pipe is 3'' as is the aftermarket one you will be buying.

Also installing a set of shorty headers on these cars, is a total waste of material and life! haha The install will be the same as doing a set of longtubes. Spend a little more and actually get some power gains.. my .02

Originally Posted by Courtesy Flush

Upon ordering i was told there was two 02 part #'s available under my vin #. Both specified as front 02's left and right. One was $120 other was close to $200.
Ill agree, something has developed.
I bought the $120 one it never worked. Took it to shop and they bought another $120 one and it worked. hmm

Lethal O/R X on the 11 car

SW LT's and o/r X on the 12.

All it takes is a simple rock flying up off the road and hitting the oxygen sensor and it will quit working. The new one you bought could have gotten dropped before you bought it and broke the ''crystal'' inside, i have seen it happen before.