Pretty sure a drop in filter makes little or no difference in causing a lean condition as it is well after the air flow sensor and there is no difference in the routing of the air. The CAI type dramatically changes the way the air enters the motor with the filter being first in line. However, been wrong before 
__________________
Never argue with an idiot. He'll drag you down to his level and then beat you with experience!!!
'05 F150 FX4 SCAB
K&N FIPK
Magellan Navigation System
Full Boar Performance SIDO exhaust
Gryphon PHP Programmer w/ custom tunes
4UCam wireless backup cam
|