i have a 2011 f150 3.7L v6 flex fuel supercrew short bed 4x2 my truck is the california edition so it has the huge cat converter that really keeps the noise down.
http://www.youtube.com/watch?v=ZhwC2ukTLQA i like the sound of this one id prefer them to exit behind the rear tires at an angle and also could someone give me an estimate range of what it would cost to do this also including installation im about to also get a roush Cold Air Intake and i heard it makes the engine sound a lot better. im going for the BMW mercedes V6 sound.