Are you talking about the plastic guards that go from radiator to underneath the engine? 2 pieces, 1 for each side-half of the vehicle and are held in with an assortment of bolts and those stupid plastic push pin things?
Shoot, I would have given you mine for the cost of shipping, but I threw them away a few months back. Honestly, I was tired of dealing with them. The bolts had become stiff inside the threaded fasteners which resulted in a couple of them tearing away from the bumper/fender over time. I didn't feel like taking the time to chase the treads with a tap.
The fractional loss in fuel mileage was worth it. If it were me, I wouldn't be worrying about them at all. Save the money for gas, or go out to a nice dinner.
'05 3.0L/Auto, AWD, 259k, stock engine and trans
'05 Dodge 2500, Cummins/48RE, QCLB, 4wd, some aftermarket goodies
'12 Buick Enclave, Premium AWD
'07 Honda VTX-1800T, tons of add-ons including electronic cruise control
'96 Honda XR400R, 426 sleeve, ported head, cam, carb, pipe, street legal