The supercharger's pulley is a high-tech clutched gadget that would be much more expensive to machine and produce then the alternative.

What's the alternative? Well, because the SRT-6 is run off of just one belt, increasing the size of the crank pulley will speed up all of the other accessories, including the supercharger, therefore making more boost.

The other pulleys included are actually smaller - why? So the stock belt will fit (this is only on some of the pulley kits, I think the 185 requires a new belt but I could be wrong).

I too was confused why I could upgrade a Lightning or Cobra's pulley for $200 or less, but couldn't do it on a 3.2 AMG. I thought it was 'brand markup' because it was a Mercedes part...but it makes sense now.

You basically buy a new Harmonic Balancer (w/crank pulley attached), and 2 new accessory pulleys. I think the price is still a bit outrageous but you have to pay someone for their product so I can't complain.

How did that modded GTP run? I've always liked them ever since I heard a video of one that was cammed. It was a tough sounding 6'er!

SQ