2005 5.4L More Horses
#11
Senior Member
It has lvl 1 trans only tune (smoother shifts etc)
Lvl 2 noticed a jump in mpg and in hp.
Lvl 3 is 93 oct only (really good hp increase )
#13
Senior Member
X2 , assuming you can manage the initial expense. A blower gives you the best driveability and the widest torque curve, by a huge margin. There is a perfectly linear connection between throttle position, acceleration and the width of your grin.