Hey people,, I,m having trouble tracking down a after market air filter for my D40, and it seems that No-one makes anything for the 2010 D40, they all advertise will suit from 06 onwards BUT,, and it,s a big BUT my airbox is smaller than my mates 06 model,, (yes both are 2.5 TD ) because i,ve tried to put his filter in mine and it,s to long,,, I,ve put on a 3" cat back exhaust and i wouldn,t mind getting a bit more air flow into the little coal burner,,