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Believe what? That the cats made the difference or that weather/track conditions/etc. made the difference?
I never said anything about making it slower. I'm simply saying removing the cats alone is not enough to gain .4 seconds in a 1/4 mile pass.
It's not possible....end of story.
Ok if you say so...
Sorry to op for taking over your post
And yes removing your cats will make your truck faster and louder
But if you did not no already removing your cats voids your Warrenty