i had a bd11a on my gt a few years back, and would never use a powerdyne blower again. first off, the brackets that hold the blower are flimsy and flex quite a bit. second, the tensioning system is by far the worst i have ever seen on any supercharger kit. it is a bracket with an idler pulley that slides down to apply pressure that bolts to the part of the drivers side accessory bracket where the ignition coil is held. i cracked mine from the pressure right between the bolt holes. on top of that, the most i ever saw out of that blower with the 9lb. pulley was 6psi. aside from that, i was never able to get the accessory belt straight and had to deal with squealing until the car was run for several minutes. all i can say about the kit is that you get what you pay for. after having both, my honest opinion would be to try to locate a used vortech. it will run you about what a new powerdyne kit would, and it will give you much more room to grow.