Renntech has great product and name that you pay for. I am sure they were the first on the market with the ODPS for this engine but after looking around I have found several decent alternatives.

I am looking at the ASP pulley system (14% boost) for $970 and a ECU tune for around $500 (or less). $1470 total and you can do the upgrade in stages. The savings will more then pay for my stereo and CF dash upgrade.

A bigger pulley is a bigger pulley IMO and the AMG supercharged 3.2L engine has been around long enough the all the Chip Tuners to have developed (or reversed engineered) the parameters/maps for the boost overdrive.

I plan on taking my stock SRT in for a dyno run. Then install the ASP pulley and dyno again for the results. Then have the ECU tuned and dyno one last time.

But this week I am having my headlamps and a tire replaced (warranty), resonator removed (when my Burns Stainless parts arrive) and next weekend I will be lowering the suspension.