i just bought these for my car as the stocker muffs are a big restriction on my car (i don't know about your guys muffs) but at 14.95 you can't beat that deal. any compitent muffler shop shold be able to put them in in about 15-20 minutes. overall my power jumped up substantualy and my gas mileage went up. the car now has a nice little grumble at idle and at WOT just plain angry :biggthump pretty much what im saying is if you want a power increse for a cheap price then summit turbos are the way to go 