Originally Posted by SRT6_Roadster
The ASP Pulley's are based on the stock crank pulley. The weld on a larger outer ring. The pulley's look completely stock when installed.
No, I did not install them myself. I had a shop do it.
From your description, I take it you noticed a good power increase, even without an ECU upgrade? I was under the impression that you needed an ECU upgrade in order to do the Pulley upgrade. As sophisticated as the Car is, I'm surprised it would "let" it work properly with just a pulley upgrade. I would assume that the MAP sensor would see the extra boost and pull back on everything. Am I wrong?