Huh? I know the sound would be quite different, but there is NO way you could ever get that much added HP just from new exhaust bits. You should rethink that comment. Unless you ment 3-5 HP? That might be plausible.rollinincaddys said:i just got flowmaster super 40 mufflers and 5 inch customized tips on my v6 sts. it sound very loud gave me about 35 - 50 horsepower . i will have the sound clip posted in a couple days and some pictures too.i think if your looking for a good sound you should get it done. costed me about 600. but its worth every penny. if you need any info email me at [email protected].