AH64DFlyboy Posted January 19, 2012 Report Share Posted January 19, 2012 So I got the 2.60 pulley from lethal performance. I was told I didnt need a new tune for this pulley as the PCM would recalibrate for the added airflow. I was looking on another site stage 3 performance and saw this write up on the same pulley I got. Upgrading your Shelby GT 500's supercharger pulley will require a re-calibration of the stock computer settings. Order your custom tune from Stage 3 Motorsports and get FREE custom tunes for life! I am trying to figure out do I need it or do I not need it. I spoke with the tune guy for Lethal and he said no. I just want to make sure. Anyone that can help please do so. Quote Link to comment Share on other sites More sharing options...
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