Okay we do not weld or bolt on the pulley. We use a factory harmonic balancer and our pulley is pressed on. We can't tell you the diameter again our disclosure our pulley is the same color as a stock pulley. We do not write or inscribe anything.

We don't need to underdrive the alternator or water pump why? For the sake of a couple horsepower the alternator is intended to run a certain way why would you change it the electronics on mercedes is very particular about current.

Our pulley is a great deal for the price as we only do local installs because we can't trust backyard mechanics to do the installs. We use all factory tools factory parts at the end of the day your engine is a Mercedes Benz.

That's the reason why a company like us don't get on forums. Because guys with questions ready to badger the companies that come on here to talk about their products. If it wasn't a science to any of this stuff software, tires, wheels, pulley's then why isn't everyone make their own homebrew equipment and sell it.

Someone here that's willing to step up and purchase our kit will be very happy and he will get before and after dyno results.