the cost for it here in the states is thirthy dollars and yes you can use it with any speedo i have used it on a gm es-9 and a lrp quantum. dont use it on a mod motor though. i have use it on stock motors and 19ts c-2 can motors.
the mid range punch is noticable as well as top end improves. a stock motor will feel like a 19t! its the tits you have to get one!
Pemberton / R1 / All out motorsports / Team Power Push