Worlds Fastest Street HD Truck
Join Date: Jun 2005
Location: Dirty Jerz
Rep Power: 71583333
it's likely for several things....the primary one is likely air flow because the center area of the gap doesn't have any with the condenser/radiator/coolers behind there. So it blocks the airflow in the gap under the headlight which minusculy helps drag, mpg, etc lol. Could also be to keep crap from flinging in from the road but lesser likely use.
Doesn't hurt to get rid of them if you close the bumper gap up.
M.HYDE: 2000 HD F-150 #0356 of 8197, Built 05/18/00, Bought 07/03/00, 820/875, firstname.lastname@example.org
D.JEKL: 2000 HD F-150 #1552 of 8197, Built 06/20/00, Bought 06/25/09, 372/450, email@example.com (SOLD 10/15/11)
REPTAR: 2012 SVTF-150 #???? of ????, Built 01/19/12, Bought 08/26/11, ???/???, 15.24@_91.71
GEN.0L: 1985 XL F-150 w/'94 Lightning Donor Engine Swap, Holley Projection EFI, 03 HD Paint