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Hypereutectic Piston Kit

KB PERFORMANCE

Hypereutectic Piston Kit

$242.95

-

Piston Kit

In Stock
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Part Number: DS-751242 . KB258.005 Categories:
Ships FREE to USA
Earn Up to 5%ZillaCash
Guaranteed Low Price
Military and First Responder Discount
KB PERFORMANCE
  • Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
  • Allow a tighter fit and longer piston and ring life
  • Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005″) tolerances from piston to piston
  • Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
  • Replacement piston rings and pin lock rings available separately
  • KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
  • 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.
Brand: KB PERFORMANCE
SKU: DS-751242 . KB258.005
Part Number: DS751242
Categories: Top End > Engine, Top End > Parts, Top End > Category Tree v2.0
Name: Hypereutectic Piston Kit
Weight 2.75 lbs
Dimensions 9.4 × 4.7 × 4.6 in
Bore Oversize - Imperial

+0.005"
Bore Size Imperial

3.498"
Piston Material

Hypereutectic Alloy
Compression Ratio Imperial

8.6:1
Product Name

Piston Kit
Riding Style

Street
Units

Kit

Brand

KB PERFORMANCE

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Piston Kit

Fitments

Year Make Model
1984 Harley-Davidson Disc Glide FXRDG
1995 - 1998 Harley-Davidson Dyna Convertible FXDS-CONV
1992 Harley-Davidson Dyna Daytona FXDB
1992 Harley-Davidson Dyna Glide Custom FXDC
1995 - 1998 Harley-Davidson Electra Glide Classic EFI FLHTCI
1984 - 1998 Harley-Davidson Electra Glide Classic FLHTC
1987 - 1993 Harley-Davidson Electra Glide Sport FLHS
1985 - 1998 Harley-Davidson Electra Glide Standard FLHT
1995 - 1998 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI
1989 - 1998 Harley-Davidson Electra Glide Ultra Classic FLHTCU
1985 Harley-Davidson Fat Bob FXEF
1994 - 1998 Harley-Davidson FLHR Road King
1998 Harley-Davidson FLHRCI Road King Classic
1996 - 1997 Harley-Davidson FLHRI Road King
1987 - 1993 Harley-Davidson FLHS Electra Glide Sport
1986 - 1998 Harley-Davidson FLHT Electra Glide Standard
1984 - 1998 Harley-Davidson FLHTC Electra Glide Classic
1996 - 1998 Harley-Davidson FLHTCI Electra Glide Classic
1989 - 1997 Harley-Davidson FLHTCU Electra Glide Ultra Classic
1995 - 1998 Harley-Davidson FLHTCUI Electra Glide Ultra Classic
1986 - 1990 Harley-Davidson FLST Heritage Softail
1988 - 1999 Harley-Davidson FLSTC Heritage Softail Classic
1990 - 1999 Harley-Davidson FLSTF Fat Boy
1993 Harley-Davidson FLSTN Heritage Softail Nostalgia
1994 - 1996 Harley-Davidson FLSTN Heritage Softail Special
1997 - 1999 Harley-Davidson FLSTS Heritage Springer
1984 - 1993 Harley-Davidson FLTC Tour Glide Classic
1989 - 1995 Harley-Davidson FLTCU Tour Glide Ultra Classic
1996 Harley-Davidson FLTCUI Tour Glide Ultra Classic
1998 Harley-Davidson FLTR Road Glide
1998 Harley-Davidson FLTRI Road Glide
1995 - 1998 Harley-Davidson FXD Dyna Super Glide
1992 Harley-Davidson FXDB-D Dyna Glide Daytona
1992 Harley-Davidson FXDC Super Glide Custom
1993 - 1998 Harley-Davidson FXDL Dyna Low Rider
1995 - 1998 Harley-Davidson FXDS-Conv Dyna Convertible
1993 - 1998 Harley-Davidson FXDWG Dyna Wide Glide
1985 Harley-Davidson FXEF Fat Bob
1987 - 1994 Harley-Davidson FXLR Low Rider Custom
1999 Harley-Davidson FXR 2
1999 Harley-Davidson FXR 3
2000 Harley-Davidson FXR 4
1986 - 1994 Harley-Davidson FXR Super Glide II
1999 Harley-Davidson FXR2
1999 Harley-Davidson FXR3
2000 Harley-Davidson FXR4
1985 - 1987 Harley-Davidson FXRC Low Rider Chrome
1986 Harley-Davidson FXRD Sport Glide Grand Touring
1984 Harley-Davidson FXRDG Disc Glide
1984 - 1992 Harley-Davidson FXRS Low Glide
1990 - 1993 Harley-Davidson FXRS-Conv Low Rider Sport Convertible
1988 - 1993 Harley-Davidson FXRS-SP Low Rider Sport
1984 - 1992 Harley-Davidson FXRT Sport Glide
1985 Harley-Davidson FXSB Low Rider - Belt
1984 - 1993 Harley-Davidson FXST Softail Standard
1999 Harley-Davidson FXSTB Night Train
1986 - 1999 Harley-Davidson FXSTC Softail Custom
1988 - 1999 Harley-Davidson FXSTS Springer Softail
1995 - 1997 Harley-Davidson FXSTSB Bad Boy
1985 - 1986 Harley-Davidson FXWG Wide Glide
1985 Harley-Davidson Low Glide Custom FXRC
1984 - 1985 Harley-Davidson Low Glide FXRS
1987 Harley-Davidson Low Rider Chrome FXRC
1990 - 1993 Harley-Davidson Low Rider Convertible FXRS-CONV
1987 - 1994 Harley-Davidson Low Rider Custom FXLR
1993 - 1998 Harley-Davidson Low Rider FXDL
1986 - 1993 Harley-Davidson Low Rider FXRS
1985 Harley-Davidson Low Rider FXSB
1988 - 1993 Harley-Davidson Low Rider Sport FXRS-SP
1998 Harley-Davidson Road Glide EFI FLTR
1998 Harley-Davidson Road Glide FLTR
1998 Harley-Davidson Road King Classic EFI FLHRC
1996 - 1998 Harley-Davidson Road King EFI FLHR
1994 - 1998 Harley-Davidson Road King FLHR
1995 - 1997 Harley-Davidson Softail Bad Boy FXSTSB
1986 - 1999 Harley-Davidson Softail Custom FXSTC
1990 - 1999 Harley-Davidson Softail Fat Boy FLSTF
1987 - 1999 Harley-Davidson Softail Heritage Classic FLSTC
1986 - 1990 Harley-Davidson Softail Heritage FLST
1994 - 1996 Harley-Davidson Softail Heritage Special FLSTN
1997 - 1999 Harley-Davidson Softail Heritage Springer FLSTS
1999 Harley-Davidson Softail Night Train FXSTB
1993 Harley-Davidson Softail Nostalgia FLSTN
1988 - 1999 Harley-Davidson Softail Springer FXSTS
1984 - 1993 Harley-Davidson Softail Standard FXST
1984 - 1993 Harley-Davidson Sport Glide FXRT
1986 Harley-Davidson Sport Glide Grand Touring FXRD
1995 - 1998 Harley-Davidson Super Glide FXD
1986 - 1994 Harley-Davidson Super Glide FXR
1984 - 1994 Harley-Davidson Tour Glide Classic FLTC
1996 Harley-Davidson Tour Glide Ultra Classic EFI FLTCU
1989 - 1996 Harley-Davidson Tour Glide Ultra Classic FLTCU
1993 - 1998 Harley-Davidson Wide Glide FXDWG
1985 - 1986 Harley-Davidson Wide Glide FXWG

Fitment Disclosure

This quick reference fitment information is provided to direct you to our catalog information and the manufacturer’s information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.

General Safety Warning

Failure to follow manufacturer’s recommendations and requirements can cause product failure resulting in serious injury or death. While effort has been taken in collecting accurate fitment information, LeMans Corporation accepts no liability for loss or damage resulting from errors or omissions. If you believe any of the information provided is erroneous, please email .

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Please note our company only purchases Milwaukee 8 exhaust systems exclusively, and currently hold purchase orders dating back more than a year. Remember, no down payment is required to join this list, which sets us apart. The process is simple - when inventory is in stock, waitlist clients will be notified in the order received, and given 24 hours to complete purchase. Not ready to buy? No problem! Customers can remain on the list, but will be moved to the bottom.

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Due to their custom nature, all HPi exhaust system sales are FINAL. MPG cannot accept returns under any circumstances. Due to labor involved, no announced/advertised or military discounts can be applied to We appreciate your understanding.