I think you're going to love them. Are you getting headers/exhaust/intake too? I'm loving my truck. It's a beast now, though. It's definitely too loud now to be incognito. It sounds and feels like a race truck. I can't sneak out of work early. It's a little more of a handful to drive. When your negotiating parking lots or coming to a stop, if you're not on the brakes hard, it can surge on you if it's loping and surges in the rpm's. When the engine is cold, it Roars to life and lopes the hardest. I back out of my garage in 12 little surges. It's just plain nasty--nothing like stock. It's fairly quiet around town, but if you accelerate hard, people a half mile away are going to hear you coming! I know the noise level is mostly due to the other mods though.
