Replacement Piston — 3.498" diameter, 4-1/4" stroke

DRAG SPECIALTIES Replacement Piston — 3.498" diameter, 4-1/4" stroke – 79-84 Big Twin, 80-84 Touring, 82-84 FXR, 84 Police

DRAG SPECIALTIES
DS-750720
750720-BX-LB1

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

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Engineered for reliable OEM replacement, this replacement piston delivers economical performance without compromising quality.

OEM quality cast aluminum alloy construction gives a balance of strength and lightweight performance.

  • Some fitments include a low-friction coating to extend piston life and promote cooler running engines.
  • Kits include two pistons, wrist pins, and clips for complete installation; rings sold separately.
  • Accepts OEM or Hastings rings (order separately) for flexible rebuild options.

Ideal for those seeking dependable, budget-friendly parts that meet or exceed OEM expectations.

: DS-750720
In Stock

Data sheet

Brand
DRAG SPECIALTIES
Bore - Oversize
Standard
Bore Size
3,498"
Compression Ratio
8.0:1
Harley Family
FXR
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 Big Twin 1979
Harley Davidson Electra Glide Big Twin 1980
Harley Davidson Electra Glide Big Twin 1981
Harley Davidson Electra Glide Big Twin 1982
Harley Davidson Electra Glide Big Twin 1983
Harley Davidson Electra Glide Belt Drive Big Twin 1984
Harley Davidson Electra Glide Classic Big Twin 1979
Harley Davidson Electra Glide Big Twin 1980
Harley Davidson Electra Glide Classic Big Twin 1981
Harley Davidson Electra Glide Classic Big Twin 1982
Harley Davidson Electra Glide Classic Big Twin 1983
Harley Davidson Electra Glide Touring 1983
Harley Davidson Electra Glide Touring 1984
Harley Davidson Electra Glide Classic Touring 1984
Harley Davidson Tour Glide Touring 1980
Harley Davidson Tour Glide Touring 1981
Harley Davidson Tour Glide Touring 1982
Harley Davidson Tour Glide Touring 1983
Harley Davidson Tour Glide Classic Touring 1980
Harley Davidson Tour Glide Classic Touring 1981
Harley Davidson Tour Glide Classic Touring 1982
Harley Davidson Tour Glide Classic Touring 1983
Harley Davidson Tour Glide Classic Touring 1984
Harley Davidson Sturgis Big Twin 1980
Harley Davidson Sturgis Big Twin 1981
Harley Davidson Sturgis Big Twin 1982
Harley Davidson Big Twin 1983
Harley Davidson Big Twin 1984
Harley Davidson Super Glide Big Twin 1981
Harley Davidson Super Glide Big Twin 1982
Harley Davidson Super Glide Big Twin 1983
Harley Davidson Super Glide Big Twin 1984
Harley Davidson Fat Bob Big Twin 1979
Harley Davidson Fat Bob Big Twin 1980
Harley Davidson Fat Bob Big Twin 1981
Harley Davidson Fat Bob Big Twin 1982
Harley Davidson Super Glide II FXR 1982
Harley Davidson Super Glide II FXR 1983
Harley Davidson Super Glide II FXR 1984
Harley Davidson Disc Glide Big Twin 1984
Harley Davidson Sport Glide Police Police 1984
Harley Davidson Low Glide FXR 1984
Harley Davidson Super Glide II FXR 1982
Harley Davidson Sport Glide FXR 1984
Harley Davidson Low Rider Big Twin 1979
Harley Davidson Low Rider Big Twin 1980
Harley Davidson Low Rider Big Twin 1981
Harley Davidson Low Rider Big Twin 1982
Harley Davidson Low Rider Big Twin 1983
Harley Davidson Low Rider Big Twin 1984
Harley Davidson Wide Glide Big Twin 1980
Harley Davidson Wide Glide Big Twin 1981
Harley Davidson Wide Glide Big Twin 1982
Harley Davidson Wide Glide Big Twin 1983
Harley Davidson Wide Glide Big Twin 1984