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After an 18-month hiatus, the Zephyr diesel pusher returned to Tiffin Motorhomes Inc.’s 2005 high-end motorhome line with limited production of about 50 coaches. The redesigned 45-foot, four-slide Zephyr boasts a 500-hp ISM Cummins engine on a 44,600-pound GVWR Spartan chassis and retails for around $380,000. A king-size bed, solid galley countertops and three air-conditioning units are standard.