Add a 'through the floor" kit on your truckmount blows the engine exhaust and blower exhaust through the van or trailer floor. Kit includes: 2-1/2 ft of 2":ID Silicone exhaust hose Helps cut down on noise Please note you will have to drill two holes in the step well of the van for installation. Estimated labor time for installation is 45 min. (labor not included) Disclaimer: The use of through the floor exhaust kit if for use when you park your van or trailer over cement and asphalt only. Do not use over grass or other flammable surfaces.