Jon70

Last weekend, after 2 days at NJMP (lightning), I noticed the rear tailpipes are asymmetrically colored. Specifically, the left side is paler and the right side looks dark (as it did before the weekend). Any ideas on the causes? I am speculating that the left cylinder bank may be running leaner. Is this something I can ignore or does it indicate anything I need to look into further? The car runs fine as far as I can tell.

My current mods exhaust wise are a Sharkwerks bypass with cargraphic light weight tips. I have no engine mods or ECU tuning.

Thanks for any input.