Fits ’11-'17 Dyna® FXD, FXDB and FXDC models equipped with Shorty Dual Exhaust. Installation requires separate purchase of Muffler P/N 64895-09 (Qty 2). Also fits 50-state ’10-'17 FXDF and FXDWG models. FXDF and FXDWG models requires separate purchase of Mufflers P/N 65884-09 and 65886-09. All Dyna® models require separate purchase of Screamin’ Eagle® high flow cleaner. '10-'11 Dyna® models require ACR Harness P/N 70623-06. Does not fit models with engine cases that have been machined to accept large-bore cylinders. Also fits 50-state ’11-'17 Softail® models (except FLS, FLSS, FLSTFBS, FLSTN, FLSTSB, CVO™ 110 models or models with engine cases that have been machined to accept large-bore cylinders.). Requires separate purchase of Screamin’ Eagle® high flow air cleaner. ’11 Softail® models require ACR Harness P/N 70623-11. Installation requires separate purchase of Primary Cover Gasket. Cam Drive Retention Kit P/N 25566-06.Cam Spacer Kit P/N 25928-06 is recommended. All models require ECM calibration for proper installation. '17 models require recalibration with Screamin' Eagle® Pro Street Tuner (sold separately) or dealership installed Screamin' Eagle calibration.