BOLD MAGENTA part numbers are new for 2026 FUEL/AIR SYSTEMS PARTS-UNLIMITED.COM OFFROAD | 2026 FUEL/AIR SYSTEMS 1589 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 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”. POWERFLOW KITS 2-STROKE/4-STROKE KITS • 2-stroke kit includes a Twin Air filter and a rigid, lightweight, billet aluminum cage that replaces the flimsy plastic stock cage and provides a tight seal to the airbox •4-stroke kit replaces the air-restricting stock backfire screen with a special backfire-resistant layer of foam laminated to the inside FITS MODEL DESCRIPTION PART # HONDA CR125/250 02-07 Backfire repl. filter 150198 CRF250R 04-09 Backfire repl. filter 1011-2042 CRF250R 18-19 Backfire repl. filter 1011-3876 CRF250RX 19-21 Backfire repl. filter 1011-3876 CRF250X 04-17 Backfire repl. filter 1011-2042 Super XR250 97-04 PowerFlow kit 150601C Backfire repl. filter 1011-0649 XR250 Baja (all) PowerFlow kit 150601C Backfire repl. filter 1011-0649 XR250R 87-06 PowerFlow kit 150601C Backfire repl. filter 1011-0649 XR400 96-06 PowerFlow kit 150601C Backfire repl. filter 1011-0649 CRF450R 03-08 Backfire repl. filter 1011-2042 CRF450R/RX 17-20 Backfire repl. filter 1011-3876 CRF450RL 21-24 Backfire repl. filter 1011-4301 CRF450RWE 19-20 Backfire repl. filter 1011-3876 CRF450X 05-17 Backfire repl. filter 1011-2042 CRF450X/L 19-24 Backfire repl. filter 1011-4301 XR600 87-02 PowerFlow kit 150601C Backfire repl. filter 1011-0649 XR650L 93-20 PowerFlow kit 150601C Backfire repl. filter 1011-0649 HUSQVARNA TC 65 17-23 Backfire repl. filter 1011-1920 FC 250/350/450 16-18 Backfire repl. filter 1011-3342 FC 250/350/450 23-25 Backfire repl. filter 1011-46291 Pre-oiled repl. filter 1011-47961 FE 250 17-18 Backfire repl. filter 1011-3342 FE/FX 350 17-18 Backfire repl. filter 1011-3342 FX 350/450 23-25 Backfire repl. filter 1011-46291 FE/FX 450 17-18 Backfire repl. filter 1011-3342 FS 450 Supermoto 16-18 Backfire repl. filter 1011-3342 FE 501 17-23 Backfire repl. filter 1011-3961 KAWASAKI KX250F 06-16 Backfire repl. filter 1011-0650 Pre-oiled repl. filter 1011-0590 KX450F 06-15 Backfire repl. filter 1011-0650 Pre-oiled repl. filter 1011-0590 KX450 19-23 Backfire repl. filter 1011-4248 KTM 65 SX/XC 09-23 Backfire repl. filter 1011-1920 85 SX/XC 05-12 Backfire repl. filter 154210 105 SX/XC 04-10 Backfire repl. filter 154210 125 98-03 (all) Backfire repl. filter 154210 125 2-stroke 04-06 Backfire repl. filter 154210 200 2-stroke 04-07 Backfire repl. filter 154210 FITS MODEL DESCRIPTION PART # KTM (CONT) 250 2-strokes 04-07 (except SX 07) Backfire repl. filter 154210 250 EXC-F 17-18 Backfire repl. filter 1011-3342 250 SX-F 16-18, SX-F FE 15 Backfire repl. filter 1011-3342 250-450 SX-F/XC-F 23-25 Backfire repl. filter 1011-46291 Pre-oiled repl. filter 1011-47961 250 XC-F 16 Backfire repl. filter 1011-3342 300 2-strokes 04-07 Backfire repl. filter 154210 350 EXC-F 17-18 Backfire repl. filter 1011-3342 350 SX-F/XC-F 16-18 Backfire repl. filter 1011-3342 450 EXC-F 17-18 Backfire repl. filter 1011-3342 450 EXC-F/Six Days 17-20 Backfire repl. filter 1011-3961 450 SX-F 4-stroke FE 15 Backfire repl. filter 1011-3342 500/525/530 EXC-F 17-23 Backfire repl. filter 1011-3961 1050/1190 Adventure 15-16 PowerFlow kit 1011-4236 Backfire repl. filter 1011-4235 1090 Adventure 16-18 PowerFlow kit 1011-4236 Backfire repl. filter 1011-4235 1290 Super Duke 15-18 PowerFlow kit 1011-4236 Backfire repl. filter 1011-4235 1290 Super Adventure 15-17, Super Adventure R/S 17-18 PowerFlow kit 1011-4236 Backfire repl. filter 1011-4235 SUZUKI RM125 04-08 Backfire repl. filter 153215 RM250 03-12 Backfire repl. filter 153215 RM-Z250 07-18 Backfire repl. filter 1011-0427 RM-Z250 19-25 Backfire repl. filter 1011-3985 DR-Z400 00-19 Backfire repl. filter 1011-0233 RM-Z450 05-17 Backfire repl. filter 1011-0427 RM-Z450 18-25 Backfire repl. filter 1011-3985 YAMAHA YZ125/250 97-25 Backfire repl. filter 22633 WR250F 01-02 Backfire repl. filter 152313 WR250F 20-24 Backfire repl. filter 1011-4037 WR250F 25-26 Pre-oiled repl. filter 1011-47921 YZ250F 01-13 (all) Backfire repl. filter 152313 YZ250F 19-23 Backfire repl. filter 1011-4037 YZ250F 24-25 Pre-oiled repl. filter 1011-47921 YZ250X 16-22 Backfire repl. filter 22633 WR/YZ400F 98-99 Backfire repl. filter 152313 WR/YZ426F 00-02 Backfire repl. filter 152313 WR450F 19-23 Backfire repl. filter 1011-4037 YZ450F 03-09 (all) Backfire repl. filter 152313 YZ450F 10-13 Backfire repl. filter 1011-2048 YZ450F 18-22 Backfire repl. filter 1011-4037 YZ450F 23-25 Pre-oiled repl. filter 1011-47921 YZ450FX 19-23 Backfire repl. filter 1011-4037 1 Flame Retardant. • Includes a rigid, lightweight billet aluminum cage •Airbox kit includes a complete airbox that increases the volume of the intake, wash plug, cage and all mounting hardware 150601C 1011-3342
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