N2 Air Filter and pre-Filter for John Deere GY21055 and MIU11511 Fits Briggs & Stratton models 31L777, 31M977, 31Q777, 3317007, 331777, 331807, 331877, 33M677 & 33M777. Replaces Briggs & Stratton #(s) 793569; John Deere #(s) GY21055, MIU11511. You can return this item (for any reason) if you ask for a return within 30 days of receiving your order and have not installed your product Warranty: This part shall be free from defects in material and workmanship under normal use and service for three-months from the date of purchase