Usually on a superchargr, the boost is changed by changing out the pulley on the supercharger itself. Even sometimes like with the SVT Cobras they have to reflash their ECUs to accomidate (sp?) the extra boost. Check out magnachargers website www.magnacharger.com and just read up about it. I do think if i remember correctly that magnacharger is cheaper then vortec and procharger, but dont hold ...



