Nope, but I gotta tellya, a custom cam (2) and only 20hp? Simply not worth it. I also doubt that MB will honor any warranty claims if you tell them that the engine has non-MB parts in it. Do they regrind your cam or do they put a whole new one in? I don't know how much it costs, but if you're going to do it you better make them give you back your old parts so you can sell them.

Kuan