SLK/R170: Crank Pulley Kit
Also, I don't understand what you mean by best. Just so you know, Dynospot Racing, Brabus, Renntech, Vaeth, Opera Design, Carlsson and Kleemann all make/made a pulley kit (don't know if they all still do). To say one is better than another is like asking me to pick a favorite kid and that's easy, the one that costs me less is always my favorite, LOL.
These kits dont give that many extra pounds. The ability for the SC to supply more air and fuel is the key.
ASP kit has all you will ever need.
Bazzle



