It's been awhile on this one, so let's recap. First off, I am still running a stock pulley, but with Code-3 bearing. This was the first attempt to get rid of the noise. Noise seems to be amplified if you turn on the AC but is in no way associated with anything in the AC system (thank GOD) except through the shared belt drive. After the $35 bearing swap did not solve the problem, took car to both a Chrysler and Benz shop and was told it was inside the Supercharger. This was 1000% incorrect. The Supercharger is fine. The noise comes from the elongation of the rivet holes that wear over time (30-40K miles). The noise is not life threatening. But sounds really bad at times. I have run a good 5-10K miles with the noise. I'm still looking for a GOOD standard pulley (low miles) if anyone has one for sale. I can not speak to the reliability of the Code-3 pulley, but the bearing has held up just fine. See my series of You-Tubes on the subject.