I doubt it's from the exhaust. You'd see it collect more as you get closer to the tailpipe. It looks too even across the bumper and likely from the road. Wash & clay bar should get that all removed. Just make sure you re-apply wax. Adding a quality sealant may also help repel it from sticking so much in the future.
It may also be iron deposits. You could try aquartz iron cut.
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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
Last edited by Cmike2780; 02-11-2013 at 05:11 PM.
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