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    KB Performance Piston Kit - 3.755 in. Bore - KB343.005

    Piston Kit - 3.755 in. Bore
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    KB Performance Piston Kit - 3.755 in. Bore - KB343.005

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    KB Performance Piston Kit - 3.755 in. Bore

    • Originally designed by Keith Black, these pistons provide a tighter fit and longer piston and ring life
    • Made from high-strength T6 heat-treated, 390 hypereutectic alloy, then diamond-machined and held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005 in.) tolerances from piston to piston
    • Each kit contains two pistons, pins, spiro-lock pin clips and Hastings moly rings
    • Replacement rings also available separately DK part no. H13008 (enough for one piston)
    • Replacement spiro-lock pin clips DK part no. 148981 (4pk)
    • Made in the U.S.A.


      • Available Sizes:
      3.750 in./Standard - Part No. 131287S
      3.755/+ .005 in. - Part No. H13239
      3.760/+ .010 in. - Part No. 1312871
      3.770/+ .020 in. - Part No. 1312872

      NOTE: KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions furnished with piston for correct piston clearance

      NOTE: Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation

      Our pistons, rings and kits are sold by application and bore size. Please note that STANDARD and OVERSIZES are not indicated. To get the correct part, you must know the standard bore size to make sure you are ordering either the standard or correct amount of oversize that you need. If you have any questions, please call Technical Service.
    Specifications
    Bore Size 3.755 in.
    Compression Ratio 10.5:1
    Mfg #: KB343.005
    Part #: H13239
    Type Piston Kit
    Units Each
    Weight 3.12 lbs
    Vendor Part Number(s):
    DS751277
    Alternate/OEM Part Number(s):
    DS751277
    UPC Code:
    800745068057
    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
    Resources & Manuals
    Instruction Manual 1.6 MiB
    Fitment for KB Performance Piston Kit - 3.755 in. Bore

    Part H13239 fits the following machines

    Harley-Davidson
    1999 2000
    1999 2000 2001 2002 2003 2004 2005
    2004 2005 2006
    1999 2000 2001 2002 2003 2004 2005
    2005
    2005 2006
    2004 2005 2006
    1999 2000 2001 2002 2003 2004 2005
    2004 2005
    2001 2002 2003
    1999 2000 2001 2002 2003 2004 2005
    2004 2005 2006
    1999 2000 2001 2002 2003 2004 2005
    1999 2000 2001 2002 2003 2004 2005 2006
    1999 2000 2001 2002 2003 2004 2005 2006
    2003 2004 2005 2006
    1999
    2006
    2000 2001 2002 2003 2004 2005 2006
    2001 2002 2003 2004 2005 2006
    2000 2001 2002 2003
    2001 2002 2003
    1999 2000 2001 2002
    1999 2000 2001 2002 2003 2004 2005 2006
    1999 2000 2001 2002 2003 2004 2005 2006
    1999 2000 2001 2002 2003 2004 2005 2006
    2004 2005 2006
    2004 2005 2006
    1999 2000 2001 2002 2003 2004 2005 2006
    2005 2006
    2005 2006
    2000 2001 2002 2003 2004 2005 2006
    2001 2002 2003 2004 2005 2006
    2000 2001 2002 2003 2004 2005 2006
    2001 2002 2003 2004 2005 2006
    2000 2001 2002 2003 2004 2005 2006
    2001 2002 2003 2004 2005 2006
    2000 2001 2002 2003 2004 2005 2006
    2005 2006
    2005 2006
    2001 2002 2003 2004 2005 2006
    2000 2001 2002 2003 2004 2005 2006
    2001 2002 2003 2004 2005 2006
    2006
    2006
    2006
    Reviews & Questions