I had read in another post that extremely discolored cats could be an indication they're bad. I attached a photo of mine. The color of the passenger one just didn't want to come out in the pic but the drivers side came out true color. I'll admit sometimes my car feels sluggish esp. when warm. I had ealier stalling problems that seem to have disappeared, could this have been why? I'm no mechanic but the colors seem odd. Am I paranoid or is this legit????:shrug: