Recent content by Z Holladay

Hi folks, new to the board. 08, 4.6L, 2WD ST Limited. K & N CAI, Gibson exhaust system, SCT tuner, 87 octane. No other modifications. Getting moderate knock / vibration after acceleration onto freeway above 60 / 65mph. Lasts for a minute or 2 then goes away. Otherwise runs great! Can't tell...