so a guy at the shop says my cat is hollowing out and that it should be replaced and is the source of a sound ive been hearing.. so he says it will be about 1200 for a new oem one from ford, but is it possible to take a cat from say a 99/04 gt or mach and put it on mine? are they the same size?

 

if hes gonna charge that much, id just get an aftermarket mid pipe

 

oh theres no way in hell i will pay anything close to that for it

 

do you have an aftermarket exhaust?

 

ive got the stock cats on but its custom after that... no crossover a.k.a. no midpipe

 

then just get magnaflow high flow cats and just have them welded in. thats what i would do in your situation

 

1200.... lol.... 500 for parts, and 700 for the ol pocket huh?

 

yeah i was thinkin about high flow cats.. gotta link for me?
also would it matter if i just got one and for the one side thats goin bad or should i replace them both?

 

If your cats ore going bad I to would just go aftermarket. Summitracing.com carries all kinds of highflow cats. Just get universal ones without air tubes for whatever size piping your current exhaust setup is.

If your using 2 1/4" here is all the universal ones they have for that size.
http://store.summitracing.com/egnsea...yPrice|0#rstop

 

For info on the Magnaflow cats, go to car-sound.com. Over there, you can view all the specs for all their cats and make a choice on which is best for your application. Probably one of the 49-state OBD-II cats for engine sizes up to 4.2L should be fine. Also, check out Jegs. Last time I bought my cats, they were a couple bucks cheaper there but Summit by far has the greater selection.

 

thanks for the link .. so im guessing i should order 2 and replace them both then?

 

yea its best to replace both

 

Yes, replace both at the same time, the highflows will flow more than the OEM ones "hinst the name" Your system will not be balanced.