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Discussion Starter #1
I inquired today about high flow cats for my truck today and the first shop wanted $300 installed for Magnaflow I believe...

Then I called a shop recommended to me by a co-worker -

I asked what they run and he said " I wouldnt take your money." Then explained that the stock cats are just as efficient as the aftermarket.


So it looks like I have $300 bucks to put else where huh?
 

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I have heard the same thing over and over.. Save your money unless they are clogged.. The factory ones are 3 in and very open..
 

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I have also been told this too but I bought mine anyways b/c I had to redo the entire exhaust system so I figured why not.
 

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Discussion Starter #4
I have heard the same thing over and over.. Save your money unless they are clogged.. The factory ones are 3 in and very open..
One less mod to worry about I guess :)
 

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The factory cats are highflow. I went with 1/4" larger diameter cats and "Y" pipe. It made a differance. It complimented the headers and cat-back.
 

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stock cats ARE high flow cats..... as long as they are in good condition there is no reason to replace them.
 
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