IMO Isspro is way better quality the the others. Some isspro series may be less expensive but if you get the EV series they are a little bit more money but suposed to be better performing. I got my whole set up for just under $360 ( autometer duel pod, isspro EV Pyro, EV 60 psi boost and both install kits). Iim trying to post a pic but it keeps saying upload failed?????
Later
Caleb