Replacement Piston — 3.498 in diameter, 4.25 in stroke, 8.5:1 compression, Kit

DRAG SPECIALTIES Replacement Piston — 3.498 in diameter, 4.25 in stroke, 8.5:1 compression, Kit – 84-86 Big Twin, 83-98 Touring, 85-99 Softail, 91-99 Dyna, 84-94 FXR, 99 CVO, 84 Police

DRAG SPECIALTIES
DS-750739
750739-BX-LB1

OEM-quality cast aluminum piston kit; includes two pistons, wrist pins, and clips. Accepts OEM or Hastings rings (sold separately).

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OEM-quality cast aluminum alloy construction delivers dependable strength and long service life. 🔧

Some fitments feature a low-friction coating that extends piston life, reduces wear, and helps the engine run cooler.

Ideal for OEM replacement and economical performance, this kit includes two pistons, wrist pins, and clips. Accepts OEM or Hastings rings (order separately). ✨

: DS-750739
In Stock

Data sheet

Brand
DRAG SPECIALTIES
Bore - Oversize
Standard
Bore Size
3,498"
Compression Ratio
8.5:1
Harley Family
CVO
Dyna
FXR
Softail
Touring
Vintage Big Twin

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Electra Glide Belt Drive Big Twin 1984
Harley Davidson Road King Touring 1994
Harley Davidson Road King Touring 1995
Harley Davidson Road King Touring 1996
Harley Davidson Road King Touring 1997
Harley Davidson Road King Touring 1998
Harley Davidson Road King Classic Touring 1998
Harley Davidson Road King Touring 1996
Harley Davidson Road King Touring 1997
Harley Davidson Electra Glide Sport Touring 1988
Harley Davidson Electra Glide Sport Touring 1989
Harley Davidson Electra Glide Sport Touring 1990
Harley Davidson Electra Glide Sport Touring 1991
Harley Davidson Electra Glide Sport Touring 1992
Harley Davidson Electra Glide Sport Touring 1993
Harley Davidson Electra Glide Touring 1984
Harley Davidson Electra Glide Touring 1986
Harley Davidson Electra Glide Touring 1987
Harley Davidson Electra Glide Standard Touring 1996
Harley Davidson Electra Glide Standard Touring 1997
Harley Davidson Electra Glide Standard Touring 1998
Harley Davidson Electra Glide Classic Touring 1983
Harley Davidson Electra Glide Classic Touring 1986
Harley Davidson Electra Glide Classic Touring 1987
Harley Davidson Electra Glide Classic Touring 1988
Harley Davidson Electra Glide Classic Touring 1989
Harley Davidson Electra Glide Classic Touring 1990
Harley Davidson Electra Glide Classic Touring 1991
Harley Davidson Electra Glide Classic Touring 1992
Harley Davidson Electra Glide Classic Touring 1993
Harley Davidson Electra Glide Classic Touring 1994
Harley Davidson Electra Glide Classic Touring 1995
Harley Davidson Electra Glide Classic Touring 1996
Harley Davidson Electra Glide Classic Touring 1997
Harley Davidson Electra Glide Classic Touring 1998
Harley Davidson Electra Glide Classic Touring 1996
Harley Davidson Electra Glide Classic Touring 1997
Harley Davidson Electra Glide Classic Touring 1998
Harley Davidson Electra Glide Ultra Classic Touring 1989
Harley Davidson Electra Glide Ultra Classic Touring 1990
Harley Davidson Electra Glide Ultra Classic Touring 1991
Harley Davidson Electra Glide Ultra Classic Touring 1992
Harley Davidson Electra Glide Ultra Classic Touring 1993
Harley Davidson Electra Glide Ultra Classic Touring 1994
Harley Davidson Electra Glide Ultra Classic Touring 1995
Harley Davidson Electra Glide Ultra Classic Touring 1996
Harley Davidson Electra Glide Ultra Classic Touring 1997
Harley Davidson Electra Glide Ultra Classic Special Anniversary Edition Touring 1995
Harley Davidson Electra Glide Ultra Classic Touring 1996
Harley Davidson Electra Glide Ultra Classic Touring 1997
Harley Davidson Electra Glide Ultra Classic Touring 1998
Harley Davidson Electra Glide Classic Touring 1984
Harley Davidson Heritage Softail Softail 1987
Harley Davidson Heritage Softail Softail 1988
Harley Davidson Heritage Softail Softail 1989
Harley Davidson Heritage Softail Softail 1990
Harley Davidson Heritage Softail Classic Softail 1988
Harley Davidson Heritage Softail Classic Softail 1989
Harley Davidson Heritage Softail Classic Softail 1990
Harley Davidson Heritage Softail Classic Softail 1991
Harley Davidson Heritage Softail Classic Softail 1992
Harley Davidson Heritage Softail Classic Softail 1993
Harley Davidson Heritage Softail Classic Softail 1994
Harley Davidson Heritage Softail Classic Softail 1995
Harley Davidson Heritage Softail Classic Softail 1996
Harley Davidson Heritage Softail Classic Softail 1997
Harley Davidson Heritage Softail Classic Softail 1998
Harley Davidson Heritage Softail Classic Softail 1999
Harley Davidson Fat Boy Softail 1990
Harley Davidson Fat Boy Softail 1991
Harley Davidson Fat Boy Softail 1992
Harley Davidson Fat Boy Softail 1993
Harley Davidson Fat Boy Softail 1994
Harley Davidson Fat Boy Softail 1995
Harley Davidson Fat Boy Softail 1996
Harley Davidson Fat Boy Softail 1997
Harley Davidson Fat Boy Softail 1998
Harley Davidson Fat Boy Softail 1999
Harley Davidson Heritage Softail Special/Nostalgia Softail 1993
Harley Davidson Heritage Softail Special/Nostalgia Softail 1994
Harley Davidson Heritage Softail Special/Nostalgia Softail 1995
Harley Davidson Heritage Softail Special/Nostalgia Softail 1996
Harley Davidson Heritage Softail Springer Softail 1997
Harley Davidson Heritage Softail Springer Softail 1998
Harley Davidson Heritage Softail Springer Softail 1999
Harley Davidson Tour Glide Classic Touring 1984
Harley Davidson Tour Glide Classic Touring 1985
Harley Davidson Tour Glide Classic Touring 1986
Harley Davidson Tour Glide Classic Touring 1987
Harley Davidson Tour Glide Classic Touring 1988
Harley Davidson Tour Glide Classic Touring 1989
Harley Davidson Tour Glide Classic Touring 1990
Harley Davidson Tour Glide Classic Touring 1991
Harley Davidson Tour Glide Ultra Classic Touring 1989
Harley Davidson Tour Glide Ultra Classic Touring 1990
Harley Davidson Tour Glide Ultra Classic Touring 1991
Harley Davidson Tour Glide Ultra Classic Touring 1992
Harley Davidson Tour Glide Ultra Classic Touring 1993
Harley Davidson Tour Glide Ultra Classic Touring 1994
Harley Davidson Tour Glide Ultra Classic Touring 1995
Harley Davidson Tour Glide Ultra Classic Touring 1996
Harley Davidson Road Glide Touring 1998
Harley Davidson Dyna Super Glide Dyna 1995
Harley Davidson Dyna Super Glide Dyna 1996
Harley Davidson Dyna Super Glide Dyna 1997
Harley Davidson Dyna Super Glide Dyna 1998
Harley Davidson Dyna Glide Sturgis Dyna 1991
Harley Davidson Dyna Glide Daytona Dyna 1992
Harley Davidson Dyna Glide Custom Dyna 1992
Harley Davidson Big Twin 1984
Harley Davidson Dyna Low Rider Dyna 1993
Harley Davidson Dyna Low Rider Dyna 1994
Harley Davidson Dyna Low Rider Dyna 1995
Harley Davidson Dyna Low Rider Dyna 1996
Harley Davidson Dyna Low Rider Dyna 1997
Harley Davidson Dyna Low Rider Dyna 1998
Harley Davidson Dyna Super Glide Convertible Dyna 1994
Harley Davidson Dyna Super Glide Convertible Dyna 1995
Harley Davidson Dyna Super Glide Convertible Dyna 1996
Harley Davidson Dyna Super Glide Convertible Dyna 1997
Harley Davidson Dyna Super Glide Convertible Dyna 1998
Harley Davidson Dyna Super Glide Convertible Dyna 1999
Harley Davidson Dyna Wide Glide Dyna 1993
Harley Davidson Dyna Wide Glide Dyna 1994
Harley Davidson Dyna Wide Glide Dyna 1995
Harley Davidson Dyna Wide Glide Dyna 1996
Harley Davidson Dyna Wide Glide Dyna 1997
Harley Davidson Dyna Wide Glide Dyna 1998
Harley Davidson Super Glide Big Twin 1984
Harley Davidson Fat Bob Big Twin 1985
Harley Davidson Fat Bob Big Twin 1986
Harley Davidson Low Rider Custom FXR 1987
Harley Davidson Low Rider Custom FXR 1988
Harley Davidson Low Rider Custom FXR 1989
Harley Davidson Low Rider Custom FXR 1990
Harley Davidson Low Rider Custom FXR 1991
Harley Davidson Low Rider Custom FXR 1992
Harley Davidson Low Rider Custom FXR 1993
Harley Davidson Low Rider Custom FXR 1994
Harley Davidson Super Glide FXR 1986
Harley Davidson Super Glide FXR 1987
Harley Davidson Super Glide FXR 1988
Harley Davidson Super Glide FXR 1989
Harley Davidson Super Glide FXR 1990
Harley Davidson Super Glide FXR 1991
Harley Davidson Super Glide FXR 1992
Harley Davidson Super Glide FXR 1993
Harley Davidson Super Glide FXR 1994
Harley Davidson Super Glide II FXR 1984
Harley Davidson Super Glide Screamin Eagle CVO 1999
Harley Davidson Super Glide Screamin Eagle CVO 1999
Harley Davidson Low Glide Custom FXR 1985
Harley Davidson Disc Glide FXR 1986
Harley Davidson Disc Glide Big Twin 1984
Harley Davidson Disc Glide Big Twin 1985
Harley Davidson Sport Glide Police Police 1984
Harley Davidson Low Glide FXR 1984
Harley Davidson Low Glide FXR 1985
Harley Davidson Low Rider FXR 1986
Harley Davidson Low Rider FXR 1987
Harley Davidson Low Rider FXR 1988
Harley Davidson Low Rider FXR 1989
Harley Davidson Low Rider FXR 1990
Harley Davidson Low Rider FXR 1991
Harley Davidson Low Rider FXR 1992
Harley Davidson Low Rider Convertible FXR 1989
Harley Davidson Low Rider Convertible FXR 1990
Harley Davidson Low Rider Convertible FXR 1991
Harley Davidson Low Rider Convertible FXR 1992
Harley Davidson Low Rider Convertible FXR 1993
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1987
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1988
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1989
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1990
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1991
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1992
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1993
Harley Davidson Sport Glide FXR 1984
Harley Davidson Sport Glide FXR 1985
Harley Davidson Sport Glide FXR 1986
Harley Davidson Sport Glide FXR 1987
Harley Davidson Sport Glide FXR 1988
Harley Davidson Sport Glide FXR 1989
Harley Davidson Sport Glide FXR 1990
Harley Davidson Sport Glide FXR 1991
Harley Davidson Sport Glide FXR 1992
Harley Davidson Low Rider Big Twin 1984
Harley Davidson Low Rider Big Twin 1985
Harley Davidson Softail Softail 1985
Harley Davidson Softail Softail 1986
Harley Davidson Softail Softail 1987
Harley Davidson Softail Softail 1988
Harley Davidson Softail Softail 1989
Harley Davidson Softail Softail 1990
Harley Davidson Softail Softail 1999
Harley Davidson Softail Night Train Softail 1998
Harley Davidson Softail Night Train Softail 1999
Harley Davidson Softail Custom Softail 1986
Harley Davidson Softail Custom Softail 1987
Harley Davidson Softail Custom Softail 1988
Harley Davidson Softail Custom Softail 1989
Harley Davidson Softail Custom Softail 1990
Harley Davidson Softail Custom Softail 1991
Harley Davidson Softail Custom Softail 1992
Harley Davidson Softail Custom Softail 1993
Harley Davidson Softail Custom Softail 1994
Harley Davidson Softail Custom Softail 1995
Harley Davidson Softail Custom Softail 1996
Harley Davidson Softail Custom Softail 1997
Harley Davidson Softail Custom Softail 1998
Harley Davidson Softail Springer Softail 1988
Harley Davidson Softail Springer Softail 1989
Harley Davidson Softail Springer Softail 1990
Harley Davidson Softail Springer Softail 1991
Harley Davidson Softail Springer Softail 1992
Harley Davidson Softail Springer Softail 1993
Harley Davidson Softail Springer Softail 1994
Harley Davidson Softail Springer Softail 1995
Harley Davidson Softail Springer Softail 1996
Harley Davidson Softail Springer Softail 1997
Harley Davidson Softail Springer Softail 1998
Harley Davidson Softail Springer Softail 1999
Harley Davidson Bad Boy Softail 1995
Harley Davidson Bad Boy Softail 1996
Harley Davidson Bad Boy Softail 1997
Harley Davidson Wide Glide Big Twin 1984
Harley Davidson Wide Glide Big Twin 1985
Harley Davidson Wide Glide Big Twin 1986