5-Star's custom tuning even takes into account tire size, drivetrain, and axle ratio so that your F150 operates perfectly with your choice of tune. ![]() Select Tunes by Octane and Performance 5-Star's tunes turn up your 2004 to 2010 F150 5.4L's power by adjusting its fuel curves, ignition timing, fan control, and a ton of other variables so that your truck makes huge amounts of horsepower and torque. ![]() You get your choice of up to five 5-Star Custom Tunes in your choice of style and fuel octane, as well as SCT's canned performance tunes on your X4 device. 5-Star's F150 5.4L Custom Tuning offers up some of the best bang-for-your-buck performance gains on the market and can noticeably improve the drivability of your truck. ![]() Complete SCT X4 Tuner and Custom Tune Package 5-Star's custom tuning boosts the power and torque output of your 5.4L Triton V8 while adjusting your F150's shift points and shift pressures to get rid of hesitation and hold onto gears longer, using the added power more efficiently. This device is not for supercharged, turbocharged, or nitrous-injected vehicles.
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