BOLD MAGENTA part numbers are new for 2024 EXHAUST PARTS-UNLIMITED.COM OFFROAD | 2024 11 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”. FACTORY 4.1 RCT (CONT) FITS MODEL DESCRIPTION PART # EMIS* SUG. RETAIL KTM 250/350/450 SX-F 07-15, XCF 07-15, XCFW 08-14, SMR 07-10 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1633 3 $549.99 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1631 3 624.99 250/350/450 SX-F/XC-F 16-17, 250/ 450 SX-F FE 15 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1698 3 649.99 250/450 SX-F FE 15 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1719 3 549.99 Anodized titanium slip-on muffler 1821-1721 3 599.99 250 SX-F 19-22 Anodized titanium slip-on muffler 1821-1925 3 829.99 350 SX-F 20, 450 SX-F 18-22 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1920 3 649.99 Anodized titanium slip-on muffler 1821-1921 3 829.99 350/500 XCF-W 20-23 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2001 3 649.99 450 XCF-W 20-23 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2001 3 649.99 SUZUKI RM-Z250 13-17 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1477 3 599.99 RM-Z250 19-23 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1958 3 599.99 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1959 3 749.99 FITS MODEL DESCRIPTION PART # EMIS* SUG. RETAIL SUZUKI (CONT) RM-Z450 18-23 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1857 3 $599.99 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1858 3 749.99 YAMAHA YZ250F 14-18 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-16102 3 649.99 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1612 3 799.99 YZ250F 19-23 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1883 3 649.99 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1885 3 829.99 WR450F 20-22 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-2012 3 649.99 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-2013 3 799.99 YZ450F 10-13 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1407 3 549.99 YZ450F 14-17 Stainless steel slip-on muffler w/ carbon fiber end cap 1821-1535 3 649.99 Anodized titanium slip-on muffler w/ carbon fiber end cap 1821-1537 3 799.99 YZ450F 18-23 Stainless steel/aluminum slip-on muffler w/ carbon fiber end cap 1821-1838 3 649.99 Titanium slip-on muffler w/ carbon fiber end cap 1821-1840 3 829.99 2 QuietCore not included. PART # SUG. RETAIL 1861-1666 $39.99 ULTRA QUIET CORE SPARK ARRESTOR INSERT FOR FACTORY 4.1 RCT •Sold each NOTE: Fits late ‘21 and ‘22 mufflers. FITS MODEL DESCRIPTION PART # EMIS* SUG. RETAIL HONDA CRF110F 19-21 Slip-on muffler w/ stainless steel mid-pipe 1821-2018 3 $299.99 Anodized titanium slip-on muffler 1821-2019 3 349.99 CRF125F 19-21 Slip-on muffler w/ stainless steel mid-pipe 1821-2020 3 299.99 Anodized titanium slip-on muffler 1821-2021 3 349.99 CRF150R 07-16 Anodized titanium slip-on muffler 1821-0547 3 499.99 KAWASAKI KLX140L/G 08-21 Slip-on muffler w/ stainless steel mid-pipe 1821-2022 3 299.99 Anodized titanium slip-on muffler 1821-2023 3 349.99 FITS MODEL DESCRIPTION PART # EMIS* SUG. RETAIL YAMAHA WR250F 07-14 Anodized slip-on muffler w/ stainless steel mid-pipe 1821-0584 3 $499.99 YZ250F 06-09 Anodized slip-on muffler w/ stainless steel mid-pipe 1821-0584 3 499.99 WR450F 07-11 Anodized slip-on muffler w/ stainless steel mid-pipe 1821-0584 3 499.99 YZ450F 06-09 Anodized slip-on muffler w/ stainless steel mid-pipe 1821-0584 3 499.99 FACTORY 4.1 SLIP-ON MUFFLERS •Factory 4.1 muffler available in natural titanium or blue anodized titanium with titanium end caps •The lightest mufflers available •Superior power and performance – horsepower improved throughout the rpm range •Feature exclusive proprietary Chamber Core technology • Factory Forward Engineering centralizes mass, improves handling •Made from premium quality American materials •Customize with performance tuning inserts and spark arrestor module •Meet AMA sound requirements on most models; inserts available for others 1821-2018
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