I saw one of the new 6. 0 powerstrokes at the sled pulls last weekend that had dual strait piped exhaust. It sounded like a jet engine at idle! Even from several hundred feet away i could hear it backing into a parking spot. sounded very cool, all you hear is turbo, no engine or exhaust sounds. But when he got into it, it reminded me of the older powerstrokes. I am not a big powerstroke fan but this one grabbed my attention.