mcarso1
08-27-2007, 04:36 PM
will deleting the muffler and cat help with mpg's and a sweeter sound without the code BS?
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Unit453 08-27-2007, 04:50 PM It'll be ALOT louder.... Some lose mpg and others gain it...Every truck is different... Also, some will throw codes and others will not so there's no telling if yours will or not. luv737superpro 08-27-2007, 05:11 PM On my 2005, it was slightly louder. Also it never threw a code, i dont really know that it affected MPG alot but it did help lower EGTS when pulling my big trailer | ||