BOLD MAGENTA part numbers are new for 2026 EXHAUST PARTS-UNLIMITED.COM OFFROAD | 2026 EXHAUST 15 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”. MINI POWERCORE 4 EXHAUST SYSTEMS •Hi-Flo end cap boosts all-around performance •Computer designed and dyno-tested for every 4-stroke application •Enhanced sonic evacuation delivers a higher flow of exhaust gases, which increases power •A stainless steel mid-pipe mates to the computer-designed rear can for lightweight durability •Round perforated steel inner cores make for optimum flow, using Hi-Flo technology FITS MODEL DESCRIPTION PART # EMIS* HONDA XR50 00-03, CRF50F 04-21 System w/ aluminum muffler and stainless steel Hi-Flo header 1820-1341 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header 1820-1317 3 Big Bore system w/ aluminum muffler and stainless steel Hi-Flo header 1820-1342 3 CRF70F 04, XR70R 01-03 System w/ aluminum muffler and stainless steel Hi-Flo header FMF041016 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF041017 3 CRF70F 05-12 System w/ aluminum muffler and stainless steel Hi-Flo header 1820-0252 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header 1820-0253 3 CRF80F 04-13, XR80R 01-03 System w/ aluminum muffler and stainless steel Hi-Flo header FMF041014 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF041015 3 XR80 86-90, 93-00 System w/ aluminum muffler and stainless steel Hi-Flo header FMF040083 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF040084 3 CRF100F 04-13, XR100R 01-03 System w/o arrestor FMF041014 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF041015 3 XR100R 86-00 System w/ aluminum muffler and stainless steel Hi-Flo header FMF040083 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF040084 3 CRF110F 13-18 System w/ aluminum muffler and stainless steel Hi-Flo header 1820-1402 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header 1820-1403 3 FITS MODEL DESCRIPTION PART # EMIS* HONDA (CONT) CRF110F 19-26 System w/ aluminum muffler and stainless steel Hi-Flo header 1821-1962 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header 1821-1963 3 CRF125F 14-18 System w/ aluminum muffler and stainless steel Hi-Flo header 1820-1539 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header 1820-1543 3 CRF125 19-26 System w/o arrestor 1821-1964 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header 1821-1965 3 KAWASAKI KLX110/L 02-25 System w/ aluminum muffler and stainless steel Hi-Flo header FMF042005 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF042002 3 SUZUKI DR-Z110 03-05 System w/ aluminum muffler and stainless steel Hi-Flo header FMF042005 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF042002 3 YAMAHA TT-R50 06-09, 13-25 System w/ aluminum muffler and stainless steel Hi-Flo header 1820-1321 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header 1820-1322 3 TT-R90 00-07 System w/ aluminum muffler and stainless steel Hi-Flo header FMF040080 3 TT-R110 08-24 System w/ aluminum muffler and stainless steel Hi-Flo header 1820-0739 3 TT-R125 00-21 System w/ aluminum muffler and stainless steel Hi-Flo header 1820-0248 3 System w/ aluminum spark arrestor muffler and stainless steel Hi-Flo header FMF040071 3 POWERCORE 4 (CONT) •FMF’s exclusive cross-weave internal packing provides longevity and maximum sound dispersion •Elliptical aluminum can offers strategic sizing for superior performance •Optional Quiet Core insert will provide a decrease in sound level if desired •Available with a screen-type spark arrestor that does not interrupt exhaust flow or performance FITS MODEL DESCRIPTION PART # EMIS* SUZUKI DR-Z125/L 03-21 Slip-on muffler 1821-0521 3 RM-Z250 04-06 Spark arrestor slip-on muffler 1821-0671 3 RM-Z250 19-24 HEX spark arrestor muffler 1821-1956 3 DR-Z400 06-07 Spark arrestor muffler 1821-2016 3 DR-Z400S 00-21 Spark arrestor muffler 1821-2016 3 DR-Z400SM 05-21 Spark arrestor muffler 1821-2016 3 RM-Z450 18-21 HEX spark arrestor muffler 1821-1855 3 DR650SE 97-20 HEX slip-on muffler 1821-2040 3 YAMAHA TW200 87-21 Spark arrestor muffler 1821-1027 3 TT-R230 05-25 Spark arrestor muffler 1821-0363 3 WR250F 03-06 Spark arrestor slip-on muffler 1821-0680 3 WR250F 07-14 Spark arrestor slip-on muffler 1821-0578 3 XT250 08-21 Spark arrestor muffler 1821-1028 3 FITS MODEL DESCRIPTION PART # EMIS* YAMAHA (CONT) YZ250F 03-05 Spark arrestor slip-on muffler 1821-0680 3 YZ250F 06-09 Spark arrestor slip-on muffler 1821-0578 3 YZ250F 14-18,YZ250FX 15-19 HEX slip-on muffler 1821-1606 3 YZ250F 19-21 HEX slip-on muffler 1821-1881 3 WR450F 03-06 Spark arrestor slip-on muffler 1821-0681 3 WR450F 07-11 Spark arrestor slip-on muffler 1821-0578 3 WR450F 12-15 HEX slip-on muffler 1821-1572 3 WR450F 20 HEX slip-on muffler 1821-2010 3 YZ450F 03-05 Spark arrestor slip-on muffler 1821-0681 3 YZ450F 06-09 Spark arrestor slip-on muffler 1821-0578 3 YZ450F 10-13 HEX spark arrestor slip-on muffler 1821-1571 3 YZ450F 14-17 HEX slip-on muffler 1821-1534 3 YZ450F 18-26 HEX slip-on muffler 1821-1836 3 YZ450FX 19-25 HEX slip-on muffler 1821-1836 3 1820-0252
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