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I ran it with tow haul on and off it didn't seem to do much. I was at 25psi down to 20psi. I do have cats,spare tire and bed cover, haven't stripped any wieght. 60-70 horse I would think a couple mph. Oh yeh its Silver!

Hey guys, New member, nice to meet everyone! I just bought a 05 QC. The truck went 14.073@ 99.59 w/2.16 short time in 72 degrees bone stock( I thought it would go faster then that). So i cut in a couple 40 series flowsmasters, ordered a ecu from DC with the stat and dropped the back 2". Went...