MTD 951-14439 Lawn & Garden Equipment Engine Air Filter Base Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; 5X65RU Air filter base 951-14439 houses the air filter for the engine Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Mtd This air filter base (part number 951-14439) is for lawn and garden equipment engines Wear work gloves to protect your hands when installing this part