I had Kleemann do a supercharger on my CLK430, and it will flat scare you. They did an excellent conversion, on time, using EXCEEDINGLY professional tools. This conversion DID NOT void my Mercedes warranty. If you are interested, lookup Kleemann on the web. They are based in Denmark, but have an office in Colorado Springs, CO. I did NOT recieve a penny for this, I am a customer only. But if they can make my Mercedes V-8 run like a Viper, they can make your Crossfire run like a banshee I am sure. Call Brandon there, he can answer the most technical of all questions.