inside of truck smell like exhaust when running in parked

[F250MCN]

I got a 2006 f250 6.0 and when am driving its fine but when its in park running i starte to get exhaust smell. if any help would be appreciate thank u

[ianstew]

up pipe leak

[quequeg37]

y-pipe flex section behind turbo, drivers side more than likely

[F250MCN]

Good deal I will check it this afternoon thank u