I was checking on the racing medallion but I sorta got the run around.Most folks said they only made it for the GS and that it came w/ 60mm piping.(some said 70mm)I got tired and called tanabe(the distributor anyway)They said they only make it for the GST's and that it comes w/ 80mm and stretches out to 100mm piping.WOW.Hope this helps out a lot.I started to worry I might loose too much low end being auto.But I guess I'll do anything to get rid o' that lag.Any way just wanted to share my little research.Nopi was the only one who listed it right.