Quote:
Originally Posted by California98Civic
It is not clear to me how this mod would change the airflow or pressure in the way you are describing. What's your theory for how this mod should/does work? How have you tested it?
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That seal is doing something in the bed to add downforce, the back end is more stable then without. Two lane roads passing a semi, it is very clear as the truck barely notices the wake from the semi... its rock solid.
MPG took a hit by 0.2~0.3 mpg. How I tested it... I can feel the added drag removed (when I pulled it off) when I tested it out on the hiway & the neutral coast down a hill.
How it is doing it, I am unclear on. Ram felt the need to add that seal sometime back in 2011~2012 on their trucks so they must have found some benefit from it for mpg's.