EXHAUST
MINI FACTORY 4.1™
EXHAUST SYSTEMS
  • Systems feature stainless PowerBomb header and midpipe
  • Factory 4.1 muffler available in natural titanium
  • The lightest full systems available
  • Superior power and performance – horsepower improved throughout the rpm range
  • Feature exclusive proprietary Chamber Core and PowerBomb technology
  • Factory Forward Engineering centralizes mass, improves handling
  • Made from premium quality American materials
  • Customize with performance tuning inserts and spark arrestor module
  • FITS MODEL
    DESCRIPTION
    P ART  #
    SUG. RETAIL
    FITS MODEL
    DESCRIPTION
    P ART  #
    SUG. RETAIL
    HONDA
    SUZUKI
    Mini Factory 4.1 system w/
    DR-Z110 03-05
    Mini Factory 4.1 system w/
    stainless steel header
    1820-1323
    $299.99
    stainless steel header
    1820-0499
    $299.99
    CRF110F 13-16
    Mini Factory 4.1 system w/
    YAMAHA
    stainless steel header
    1820-1404
    299.99
    TT -R125 00-15 (all)
    Mini Factory 4.1 system w/
    KAWASAKI
    stainless steel header
    1820-0502
    299.99
    KLX110/L 02-16
    Mini Factory 4.1 system w/
    stainless steel header
    1820-0499
    299.99
    FACTORY 4.1™
    SLIP-ON MUFFLERS
  • The lightest mufflers available
  • Superior power and performance – horsepower improved throughout the rpm range
  • Feature exclusive proprietary Chamber Core technology
  • Customize with performance tuning inserts and spark arrestor module
  • Meet AMA sound requirements on most models; inserts available for others
  • SUG.
    SUG.
    DESCRIPTION
    PART #
    RETAIL
    FITS MODEL
    DESCRIPTION
    PART #
    RETAIL
    HONDA
    KTM (CONT)
    CRF150R 07-16
    Anodized slip-on muffler w/ stainless steel
    450-525 EXC/ MXC/
    mid-pipe
    1821-0545 $399.99
    SX/XC 04-06, XC/ Slip-on muffler w/ stainless steel mid-pipe
    Anodized titanium slip-on muffler
    1821-0547
    449.99
    XCW 07
    mid-pipe
    1821-0234 $374.99
    CRF250R 04-05
    Slip-on muffler w/ stainless steel mid-pipe
    1821-0249
    424.99
    690 SMC/
    CRF250X 04-09/
    Enduro 08-13
    Slip-on muffler
    1821-0859
    399.99
    12-17
    Slip-on muffler w/ stainless steel mid-pipe
    1821-0249
    424.99
    SUZUKI
    RM-Z250 04-06
    Slip-on muffler w/ stainless steel mid-pipe
    1821-0287
    424.99
    Slip-on muffler w/ stainless steel mid-pipe
    1821-0282
    424.99
    HUSQVARNA
    RMZ450 08-10
    Slip-on muffler w/ stainless steel mid-pipe
    1821-1146
    424.99
    TC250 10-11/ TXC250
    YAMAHA
    10-12
    Slip-on muffler w/ stainless steel mid-pipe
    1821-1585
    424.99
    WR250F 07-14
    Anodized slip-on muffler w/ stainless steel
    TXC450 10-12
    Slip-on muffler w/ stainless steel mid-pipe
    1821-1581
    424.99
    mid-pipe
    1821-0584
    424.99
    Anodized slip-on muffler w/ stainless steel
    mid-pipe
    1821-0584
    424.99
    KX250F 04-08
    Slip-on muffler w/ stainless steel mid-pipe
    1821-0287
    424.99
    WR450F 07-11
    Anodized slip-on muffler w/ stainless steel
    KX450F 06-08
    Slip-on muffler w/ stainless steel mid-pipe
    1821-0379
    424.99
    mid-pipe
    1821-0584
    424.99
    YZ450F 06-09
    Anodized slip-on muffler w/ stainless steel
    Slip-on muffler w/ titanium mid-pipe
    1821-1762
    499.99
    mid-pipe
    1821-0584
    424.99
    250 SXF 05-08
    Slip-on muffler w/ titanium mid-pipe
    1821-0318
    399.99
    To avoid blueing, consider properly tuning the vehicle; however, the vehicle must always remain within the legal standards for emissions controls as
    defined by EPA, CARB and any other applicable state laws.
    DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
    SEE PAGE 4 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION.
    2017 PARTS UNLIMITED OFFROAD