On my truck, I dropped the air dam 6.5" lower and bumped the bottom lip forward about 3". Installed a lower pan fer that so it's pretty smooth from there. Also, I put in some front tire air blocks...4" clearance from the ground. Just installed a 4x8 luan panel fer my belly pan. Installed some side skirts with about a 4-5" clearance from the ground. Original clearance was about 13". Working on buttoning up the rest of the bottom to the side skirts and to the rear as well as in between the front air dam and the front crossbar.
My average winter mileage is better than my average summer mileage so far...
Lower belly pan build,
lowered air dam build...
