I'm starting to think about some type of intake and exhaust system on my Truck. On my past pickups I've always done some sort of cold air induction and cat back system. Not sure how it would effect this engine, it's very different than anything I've had in the past.....Having said that, I've never really liked the sound of a V6 with cat back.....has anyone done these mods? And if so what did you do? What was the impact on performance and more importantly to fuel economy? How does it sound? Does it impact warranty? Thanks in advance............John