vortec has been concentrating on theyre paxtons thats y.i have both ,the vortec is nice and quiet you dont even hear it on the rd,but it only puts out 1k cfm.i run 10 psi through it and it runs hard but seems to run out of power on the highway around 100.the paxton on the other hand is an animal,powere all the way through and never runs out ,but its noisier and it does put out 1500 cfm ,so thats the reason its so mutch better imo.vortec are very pricey also.my setup was 6500.charger ,intercooler,injectors,everything ,they do match everything very nicely.so what im trying to saay is go for the new paxton illl bet its an animal.mines the nov 2000.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .