Is this 400ex exhaust stock? *Pics*

Bought this 400 ex earlier this year. Was told it was a 426 w/ hot cam, etc. Smokes some but runs like a beast.

Anyway, was looking at a friends stock 400ex and his exhaust looks different than mine. Definitely different. Can someone identify what I have? The clutch cable is routed differently due to the different shape of the pipes.

Also, the carb looks different. It doesn’t have 2 of the hoses coming off the left side of the carb body, only one hose? Looks the same otherwise. No pics of that but any ideas on the carb?

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