there all good. vortech is not a big as the procharger but just as good, i think someone was selling a vortech kit for 3200! with everything but fuel stuff. procharger is a excellent blower as well, get it from epp, there always helping people out in this site, great cutomer service and have a complete kit for like 6000. I was thinking of going procharged but my brother already has one so want to try something different, i was thinking about the new maggie for fbody's, they make their power almost instantly , the only thing is that its only good for like 9psi of boost so just wating to see if they can put the bigger 122h blower or a kenny bell, then i will get the kit for sure, i believe the company name is late model speed.