With that many miles, down on power and numerous performance mods over time, I would look at the cat convertors being plugged or damaged. I would replace them anyway just to get some high flow cats on there.
With that many miles, down on power and numerous performance mods over time, I would look at the cat convertors being plugged or damaged. I would replace them anyway just to get some high flow cats on there.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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