BOLD MAGENTA part numbers are new for 2025 EXHAUST PARTS-UNLIMITED.COM OFFROAD | 2025 EXHAUST 25 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”. PART # DESCRIPTION 1860-0586 Replacement flange kits REPLACEMENT FLANGE KIT FOR HONDA CRF250R 04-09 • Replace worn-out, damaged or old flange hardware •Available in two- or three-piece flange assembly kits • Spring available separately, PART #FMF011396 FITS MODELS PART # YAMAHA YZ250F 19-24 1861-1607 YZ250FX 20-23 1861-1607 YZ450F 18-24 1861-1607 FITS MODELS PART # YAMAHA (CONT) YZ450FX 19-24 1861-1607 UNIVERSAL For all Megabomb headers 1861-1643 TITANIUM HEAT SHIELD •Includes mounting hardware •Sold each FITS MODEL PART # HONDA CRF250R 04-05 1860-05801 CRF250X 04-09 1860-05801 XR400R 96-04 1860-0584 FITS MODEL PART # YAMAHA YZ250F 06-11 1860-0582 YZ450F 06-09 1860-0582 1 Use FMF muffler to FMF header. REPLACEMENT ALUMINUM INLET SLEEVES •Replacement sleeves for worn-out mid-pipes •Available for many models DESCRIPTION PART # POWERCORE 2 1.0” repl. rear cone cap FMF020461 TURBINECORE 2 1.25” repl. rear cone cap FMF020464 1.375” repl. rear cone cap FMF020465 FACTORY 4.1/FACTORY 4.1C/FACTORY 4.1 RCT RCT replacement spiral retaining ring 1860-1050 RCT spark arrestor insert (for 2010 models only) 1861-0170 RCT spark arrestor insert (for 2011 models only) 1861-0698 RCT spark arrestor insert (for YZ250F/450F 14-17) 1860-1372 RCT 94 dB w/ spark arrestor insert 1861-0699 RCT 94 dB w/spark arrestor insert (for KTM 2016 models only) 1861-1097 RCT repl. end cap kit, stainless steel 1860-0561 RCT repl. end cap kit, titanium 1860-0562 RCT repl. end cap kit, carbon 1860-0563 DESCRIPTION PART # FACTORY 4.1/FACTORY 4.1C/ FACTORY 4.1 RCT (CONT) Repl. rear cone cap, titanium 1860-0503 Spark arrestor 1861-01701 POWERCORE 4/TI POWERCORE 4 Modular Quiet Core insert 1860-0598 Repl. rear cone cap, stainless steel straight cut 1860-0500 Repl. rear cone cap, stainless steel slash cut 1860-0501 Repl. rear cone cap, stainless steel 1860-1049 Short strap mount w/o rings FMF0401962 Medium strap mount FMF0401972 Long strap mount w/o rings FMF0401982 POWERCORE 4 HEX Spark arrestor insert 1860-0703 Q4 Repl. rear cone cap, stainless steel straight cut 1860-0500 DESCRIPTION PART # Repl. rear cone cap, stainless steel slash cut 1860-0501 Q4 HEX Spark arrestor insert 1860-0701 Repl. rear cone cap, stainless steel 1860-1049 TITANIUM 4 Repl. springs and clips FMF040186 HEAT SHIELDS Universal stainless steel header heat shield 1861-0043 Universal titanium header heat shield 1861-0169 SPRING KIT 70mm stainless swivel spring kit FMF011396 1 Not for CRF250R w/ dual mufflers; use PART #1860-0104. 2 Not for minis. 3 Not for CRF250R with dual mufflers. REPLACEMENT PARTS AND ACCESSORIES FOR FMF EXHAUST 1861-1607 1860-0582 1861-0170 1861-0043 FMF011396 FMF040197
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