Check the listing for details. DUAL UNIT (2X) COLEMAN RV A/C Upgrade MODIFICATION KIT - Increase RV Airflow!. Condition: New. Listed at 69.99 USD. FAST SHIPPING TRUSTED SELLER SECURE SHOPPING 2x COLEMAN MACH RV A/c modification - UPGRADE KIT BENEFITS & FEATURES: • Improved CFM (approx 30%) on your Camper A/C – even at the furthest vents. • Improved noise reduction. • Time and money savings over doing the modification with store bought materials. • Huge savings over commercially available manufactured modification kits.Highly detailed simple instructions included. Item Description This is a pair of CNC cut precise fit kits for COLEMAN MACH 3, 10, 15, Q models. These kits may fit other COLEMAN with minor modifications. This simple modification increases the air flow out of the vents by removing turbulence at the source and directs the air pressure through the ducts making it much more efficient. You can run the a/c unit at lower fan speed with the same result as if the fan was on high speed. If you are unfamiliar with the modification, there are many YouTube videos on this subject. Many RV manufacturers are now including a similar modification with new units. Bring your older unit or less equipped a/c unit up to modern specifications. Save both time and money with this kit. It includes the materials needed and not the cost of or handling of excess material from a full sheet of foam board. The pieces are precision fit CNC cut, so no need to drag out the tools for measuring, cutting and trial fitting to get the job done efficiently. *Color of foam may vary * For ducted units