This is a brand new muffler. The specs are as follows: B Low tone, two step type. OD 3" Length 3.8" Intake Port 0.925" OD x 1.4" L Threads 3/4" male Replaces part numbers: PT4336 JOHN DEERE 105-163 STENS 1269 ROTARY 35-012 OREGON 390249 BRIGGS & STRATTON 393010 BRIGGS & STRATTON 7-7717 SNAPPER Thanks For Your Business!! 35-012