I have a mustang with the powerdyne bd-11a. I dont much like the unit it wasnt half as good as the vortec i had but it came with the car. I think it has the stock pulley on it mainly because i dont feel any pull from the motor untill 3500 rpm. I dont see any management with the unit that im used to seeing with vortec. Im sure it has a chip for the computer but no boost retard. Im looking to change the pulley to the 9 psi pulley and see if i can run a bit harder. I have heads, exhaust, and the bottome end is stock. Anone have any ideas on where i can get the pulley for that? Hell at this point i may just sell it and go back with a vortec finding parts for these are a pain in the ass! Thanks for any help anyone can gice.