depends...Duckys V6 runs 16.5s with a nelson tune, vette servo, heads, exhaust etc and stock rims.....That guy on PT probably had more mods on his than just stock and 20s....Cause Mine was stock for a while with 20s and it was freaking sloooooowww....and plus I just looked on Hypertechs website and the HP gains were only 5-6 HP
2012 F-250 XLT/FX4 RCLB 6.7 Powerstroke
H&S XRT Pro Race(550hp/1100tq)/ 4" flopro exhaust/H&S EGT kit/SPE Full diff unlock/S&B CAI/H&S motorsports upcharge pipe kit/ DPF,CAT,EGR,UREA Deleted/Icon 3.5" Lift-Vs 2.0 shocks/PMF DSS w' Bilstein 5100s/Icon Adj Track Bar-upgraded steel bearing/RIGID LEDs/Kenwood DNX570HD w/idatalink maestro/Hertz5x7s/Memphis 12" slim/500.1 JL slash amp/Recon f250 led emblems