I really think it's like to add 2" to mine, I mean really, who didn't want another 2"! Sorry, that's another subject lol. Anyway, it seems through searches that most of the cats that used to do this are gone or just don't do it anymore. I have a really cool Rap 700 aluminum attn that I wish found be made to work. I Love The axle adjustment on those, it was so simple on the old 700 I had. Man that machine was a beast with mods!