My truck has a Superlift suspension lift. Have this kit for 2 years now, and I have no issues with it. It’s a solid lift that provides good ride quality when driving off the road.
Line X have white but I've heard that it will discolor or become yellowish overtime. You can ask a reputable shop about it. I know SEM "Rock It" has white as well.
I just replaced the stock with Flowmaster 10 series. I want something loud, and I got a good deal on this muffler at http://4wheelonline.com. Love the sound but I'm thinking of replacing it since my friend is selling a Borla catback for cheap.