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Discussion Starter · #1 ·
I see a few guys still running their stock CAT, myself included. I would have ditched it along time ago, but here in California I wanted to be able to return the truck back to stock in an hour or so. Will the CAT get clogged or damged running these higher HP tunes?
 

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Discussion Starter · #4 ·
Doesnt the stock cat just resrict air flow? And couldnt you replace downpipe with free flowing one and then add Magnaflows high flow catalitic converter Then you would still pass emissions with it wouldnt you?

It is still unkown exactly will be done with the tests.
 
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