Thank you both ifly and ncx and everyone else who responded. Ifly, I think you already provided me with the parts number on the flares itself for the 4.6. It was quite expensive almost $600 bucks for all 4 of them. Thats almost the cost of the running boards itself.

Hmmm...do you guys think that this will look bad on my car without the 4.6 flares. I mean I do plan on installing the 4.6 body kit. Is this going to be really obvious or should I get the parts and be done with it. Also, do you guys think that the flares that come with the running boards will be wide enough for my 20's? What I want to avoid is the tires exceeding past the flares. I would like to have that nice perfect tucked look that matches the flares width but not exceeding it.

I have attached a picture of a 4.4 X5 with the running boards. Seems like this guy has no flares at all. Or does picture include the flares from the running boards?

Attached Images

 

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Current cars:
03 BMW X5 4.4i NAVI (Dinan software upgrades-tranny and Engine ECU, 4.6 body kit w/ 20's staggered wheels, aluminum running boards, M3 SMG steering wheel, eisenhaus race exhaust, predator angel eyes, 6000k HID fogs, hardwired V1 radar)
06 Honda Odyssey EX-L RES NAVI (4300k HID's)
00 Mercedes S430 SPORT NAVI
08 Honda Accord V6 NAVI sedan (4300k HID's)