Dallas Fort Worth 5.0 Mustang Club - Difference in 1 5/8 and 1 7/8 LT headers

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- - Difference in 1 5/8 and 1 7/8 LT headers (http://www.dfw50s.com/showthread.php?t=498)

Quote:

Originally Posted by TrueStreetTim (Post 7298)

I see no reason why the midpipe itself would be an issue. It's the cats that need to be a high flow design with a power adder. Maybe look to an H-pipe with high flows into your soon-to-be GT500's perhaps? Or just high flows alone will suffice. Toby may have a better opinion on that.

I have a set of high flow cats for sale Steve. They are shiny like your wheels :)

Quote:

Originally Posted by Courtesy Flush (Post 7301)

I have a set of high flow cats for sale Steve. They are shiny like your wheels :)

Hmmm.

Quote:

Originally Posted by Steve (Post 7235)

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

Quote:

Originally Posted by Courtesy Flush (Post 7264)

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.

Quote:

Originally Posted by Steve (Post 7272)

What about with the stock headers? Will the stock midpipe live a long happy life with a power adder? I'm asking, because I don't want this car to be obnoxiously loud. My little girl rides in this car often and I rather not she be deaf by the time she is five. lol

There is a guy on SVTP (ruswolf i think) that melted his stock cats basically after installing the paxton. the tune just tore them up.

Quote:

Originally Posted by 5PointSlow (Post 8292)

There is a guy on SVTP (ruswolf i think) that melted his stock cats basically after installing the paxton. the tune just tore them up.

I figured as much that would happen at some point.

the paxton tune was extremely rich though. If im not mistaken I think our cats might be the same as the 11-12 GT500s