WINDSHIELDS & FAIRINGS AUDIO, COMMUNICATION & MOUNTS SADDLEBAGS & LUGGAGE SEATS & SISSY BARS FUEL/AIR SYSTEMS EXHAUST TRANSMISSION & DRIVELINE ENGINE GASKETS & SEALS LIGHTING ELECTRICAL HANDLEBARS, CONTROLS & MIRRORS CABLES TANKS & OIL FILTERS BRAKES DASHES & GAUGES FENDERS & LICENSE PLATE FRAMES HARDWARE, COVERS & GENERAL FRAMES & SUSPENSION FOOTRESTS & FLOORBOARDS WHEELS & AXLES All part numbers in BLUE are new for 2026. SECTION 6 478 See OLDBOOK For Early Model Applications DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 5-7 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. PART # DESCRIPTION EMIS* ECM 1020-42891, 3 For 24 FLHX/FLTRX/FLTRXSTSE 3 1020-35143 For 24 FLHTK/FLTRK/FLHRXS, 21-23 FLHT/FLHX/ FLHR/FLTR (except 23-24 FLHXSE/F LTRXSE), 21-24 FLHTCUTG/FLRT/FLTRT 3 1020-26642, 3 For 17-20 FLHT/FLHR/FLHX/FLTR/ FLTRX/FLTRU/FLTRK/H-D FL Trike 3 1020-21183 For 14-16 FLHT/FLHR/FLHX/FLTR/H-D FL Trike 3 1020-08363 For 08-13 FLHT/FLHR/FLHX/FLTR, 09-13 H-D FL Trike 3 1020-1851 For 02-07 FLHT/FLHR/FLHX/FLTR 3 1020-42903 For 25 Softail 3 1020-35153 For 21-24 Softail 3 1020-27952, 3 For 18-20 Softail 3 1020-2526 For 14-15 FXSBSE/FLSTNSE, 16-17 FXDLS, 16-17 FXS/FLS/FLST 3 PART # DESCRIPTION EMIS* ECM (CONT) 1020-2360 For 12-15 FXS/FLS/FLST, 12-17 FXD/FLD/FXDWG (except FXDLS), 14-20 XL 3 1020-2663 For 14-15 FXSB 3 1020-1851 For 01-10 FXST/FLST, 07-09 XL 3 1020-2361 For 08-10 FXCW/C, 09 Softail SE, 04-11 FXD/FXDWG, 10-13 XL, 08-12 XR1200/X (includes mini USB pigtail) 3 1020-18533 For 02-17 V-Rod 3 REPLACEMENT PART 1022-0039 Repl. 18 mm oxygen sensor (ea.) N/A 1 Not for models with VVT motors. 2 Not interchangeable or upgradeable from PART #1020-2118. 3 Will require the use of an exhaust system with 18 mm sensor bungs or headpipes must be modified to accept 18 mm sensors. THUNDERMAX ECMS WITH INTEGRAL AUTO-TUNE SYSTEM •ThunderMax ECM with Auto-Tune module mounts conveniently in place of the factory ECM and plugs into the existing harness •Utilizes wide-band O2 sensors and works as a closed-loop control system to continuously self-adjust and properly tune the motorcycle’s air/fuel ratio for all riding conditions •Easy installation: replace the factory ECM, install new O2 sensors and harness, load the correct map for your bike, and ride •Includes ThunderMax ECM with Auto-Tune Module, plug-in harness and two wide-band sensors, TMax software and communication USB cable, Quick-Start Easy Install and Comprehensive User’s Manual, technical support and free software and updates •Hundreds of maps available to download for your bike (based on model, engine size, exhaust system air cleaner, pistons, cams, etc.) – load the map of your choice and the integral auto-tune will do the rest •Improves throttle response, exhaust sound and drivability •Does not require dyno tuning PART # DESCRIPTION EMIS* FOR NATURALLY ASPIRATED MODELS 1020-4238 For 21-24 FLHR/FLHX/FLHT/FLTR 3 1020-4214 For 17-20 FLHR/FLHX/FLHT/FLTR 3 1020-4241 For 21-24 Softail 3 1020-4217 For 18-20 Softail 3 1020-4237 For 14-17 Softail 3 FOR MODELS WITH TRASK TORNADO TURBO KIT (2 BAR MAP SENSOR) 1020-42391 For 21-24 FLHR/FLHX/FLHT/FLTR 3 1020-42151 For 17-20 FLHR/FLHX/FLHT/FLTR 3 1020-42421 For 21-24 Softail 3 PART # DESCRIPTION EMIS* FOR MODELS WITH TRASK TORNADO TURBO KIT (2 BAR MAP SENSOR) (CONT) 1020-42181 For 18-20 Softail 3 1020-4221 2 BAR map sensor 3 FOR MODELS WITH TRASK TORNADO TURBO KIT (3 BAR MAP SENSOR) 1020-4240 For 21-24 FLHR/FLHX/FLHT/FLTR 3 1020-4216 For 17-20 FLHR/FLHX/FLHT/FLTR 3 1020-4243 For 21-24 Softail 3 1020-4219 For 18-20 Softail 3 1 2 bar MAP Sensor PART #1020-4221 (sold separately). AUTOTUNE ELECTRONIC FUEL INJECTION CONTROL MODULE KITS •Quickly auto-tune fuel curves for front and rear cylinders on a dyno or on-road with new WEGO IIID dual channel wide-band oxygen sensor interface •Robust alpha-N (throttle position and rpm-based) fuel control eliminates problems with long duration/high overlap camshafts •Extended data logging and diagnostics •Data flash memory stores full 60 minutes of operating data at 10 samples/second •Programmable user input for functions such as two-stage rpm limiter, nitrous retard, and shift kill •Programmable user output for functions such as shift light, nitrous activation, and electric shifter •Powerful Windows software for custom programming and data analysis •Rider can adjust idle speed, rev limit and speedometer calibration •Adjustable front and rear cylinder AFR maps, ignition timing (spark) maps, and startup maps •Works with all popular exhaust systems and is compatible with high-performance camshafts •Supports turbo, nitrous and supercharger applications •Software program allows live monitoring, recording and examination of diagnostic codes and datalogs including number of starts, engine temperature and rpm operation •New maps, software, firmware updates, map analysis and tech support available online at no charge •Made in the U.S.A. NOTE: Because of possible clearance issues, some aftermarket exhaust systems may require modifications or relocation of their O2 sensor port bungs. •Billet aluminum housing with black anodized finish •Fully programmable plug-in replacement •Easy plug-in installation •Made in the U.S.A. NOTE: Does not work on models with VVT (variable valve timing). NOTE: Some aftermarket exhaust systems may require modifications or relocation of their O2 sensor port bungs to avoid clearance issues. NOTE: Turbo ECM kits are race only and require a qualified technician to install. 1020-4214 1020-4215 1020-4219 1020-4289 1020-3514 1020-1851 1022-0039
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