If your going by the EVIC IMO there not that accurate. CAI was only werth 6 hp on the dyno and even at sea level 13.00 is ok but the mph is way off as mph in drag racing is an avg of the 1/4 mile not clocked with a radar gun or with the speedo. My 1ST time out i was bone stock and ran a 8.39 1/8 = 13.14 1/4. 2ND time out i had CAI AND DYNO TUNE and ran a 8.26 1/8 = 12.91 1/4. Hope this helps.