cheers AR.. is there much stretch in the 3" connectors as the pipes on the airbox i would say are maybe three and a quarter inches and the intake pipes on the xf are 3" if they will work i would be very grateful to you for them mate, as for filters i just used standard filters from an autofactors they are made by mann so decent make, would have liked to go down the k+n route but mrs. is already rolling her eyes for spending (they dont understand )...