i had a Seidl-Tuning kit on my 90cs... i know they make stuff for the 80. The only problem is, they dont really sell their stuff in the US as far as i know (they guy i bought the CS from had the kit imported from Germany). I just searched them quickly on google but i couldnt find anything worth while. their stuff is awesome if you can find it. good luck
Edit: haha...you're not in the US so you may not have as much of a problem.