Hustler Sport 48 Series engine air filter box. 1x FR600V / FR541V series 2 stage air filter box. 4 layer Silicone hose and clamps. 1x set of 2 stage commercial style air filters (FPG05 Filter set). Hardware installation screw kit. Two screw install, Installs in 10 minutes! Commercial air filter box only fits zero turn mowers with the following. FR600V – FR541V ONLY. Hustler Sport 48 (With FR600V / FR541V engine). You will receive 1x brand new air box with filter set.