(Nov. 21, 2011) -- Tiffin Motorhomes, Inc. is recalling 279 model year 2011 Allegro and Phaeton RVs built on Freightliner chassis and equipped with a Cummins ISC, ISX, ISM, or ISL diesel engine.The V-band clamp assembly used to connect the inlet and outlet cone sections to the diesel oxidation catalyst include a T-bolt which can fracture and fail when subjected to stress or load.