The side sills are basically what the X5's without running boards have. I actually bought a set used from someone who installed running boards and had no use for them. My X5 is black so I don't have to get them painted and they will match the wheel arches and bumpers for an all black look!

I think your exhaust tips need more work than just painting them black. They need to be cut back! They stick out too much. My body shop recommended powdercoating the tips as even the high heat paint will start to fade or look weathered after a while.

You could paint the side strips white - (that's what the X5M looks like) although the black accents look good on yours like the roof rails and mirrors.

Looking forward to more pics!

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2008 X5 4.8i - Jet Black / Black Nevada Leather / Specs: Every possible factory option