S13 5 speed internal upgrades for trans?
 

I've looked everywhere I can think of and noone seems to make any upgraded thrust washers, shift forks, gears, etc. for the FS5W71-C transmission? Does anyone know of a company or kit sold that allows you to upgrade the trans? I have a twin disk clutch that works great and really don't want to switch to the VG trans and drivetrane if I don't have to. Thanks guys!

akaik the only internal upgrades available for that trans are the gears and the main shaft. If u don't want to convert to the VG tranny then get a performance transmission; sequential or dogbox.