I think Claus Wagner has the sport cams in his Z8, and Shadowman probably has it in his car too. The last time I looked they were about $4000 USD plus a lot of $$$ for the installation. My understanding is that they work much better in the upper rpm ranges without much sacrifice of low end power. It was a cam BMW considered using for the production car. If you add other mods to help the car inhale or exhale, it will enhance the gains using the cams.m5.individual said:Anyone with a suggestion?