My 08 had none on the driver side either. Ford told me they were discontinued and it was to provide additional cooling. I ordered one for the right side flipped it around and put it on and my truck did not run hotter nor did I have any problems after 3 years of it being installed.

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George

2011 Ranger Sport 4 door SuperCab 4X4 Oxford White, 4.0 Auto Mods: XLT Carpet, Pin Stripes, Clear Corners, Extang Revolution Tonno, LineX, Pre Key mod, tailgate lightbar, cab lights, Muth heated signal mirrors
2008 Ranger Reg Cab 4X2 Redfire Vulcan Auto Mods:FX4 body color grille, Sport aluminum wheels, Extang Revolutioin Tonno, color matched bed liner, tailgate lightbar TRADED