I've had Super Turbo's on my Superbird since 1992,replaced both in 2003 and one about two years ago,have them on my 62 wagon (3") since 2012,no problems.One thing to remember,keep your receipt,they will replace them as long as you own them,that includes replacements.My only dislike is that the with full 3" Max Wedge system on my wagon,they are just a little louder than I'm comfortable with.