the key is balance your power out, i UDP and DM installed soe other parts and im not suffering anything, my A/C works jus the same, my accel increased drasticly tho, and pullies dont increase HP jus your ACCEL.
Good article
I'm not a big fan of UDP anyways since they also slow down your alternator and that also hurts your ignition system like the spark
thats a big NO NO when using Nitrous