I HAVE THE COMPLETE GROUND EFFECTS KIT FROM A 99 LIGHTNING THAT I WILL BE INSTALLING IN A 99 F-150 SUPERCAB. THE ONLY PIECE THAT I WOULD BE MISSING IS THE SIDE SKIRT UNDER THE EXTENDED PART OF THE CAB, SINCE IT OBVIOUSLY DOESN'T COME ON THE LIGHTNINGS. DOES ANYBODY KNOW WHERE I CAN GET THAT SIDE SKIRT OR SOMETHING SIMILAR? I APPRECIATE ALL YOUR HELP. THANKS.

 

try contacting roush, they may have a body kit piece that works

 

I have a pair of the long pieces that came of a black 1999L that I took apart. They're not perfect, but would be just fine for cutting and fitting to make yours longer. Send me an e-mail. You can find my through my member profile.