I have an aftermarket catback exhaust and K&N drop-in air filters, and it is still considered C stock. Anything more like intakes, etc and it wouldn't be 'stock' anymore. You sure an oil cooler makes it not stock?
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Pearl White 2010 370Z Sport, Stillen CBE, tint, K&N drop-in filters, GT-R start button, Kenwood DNX-6980 with backup cam, LED bulbs, Raceseng shift knob.
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