Replacement Piston — bore 3.437 in, piston diameter 3.467 in, stroke 3-31/32 in

DRAG SPECIALTIES Replacement Piston — bore 3.437 in, piston diameter 3.467 in, stroke 3-31/32 in – 41-72, 79 Big Twin, 79 Touring

DRAG SPECIALTIES
DS-750703
750703-BX-LB1
Economical OEM replacement kit includes two pistons, wrist pins and clips; accepts OEM or Hastings rings (order rings separately).
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€99.22
€110.03
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🔧 OEM-quality cast aluminum alloy construction provides a reliable, direct-fit replacement for original pistons.

: DS-750703
In Stock

Data sheet

Units
Pair
Brand
DRAG SPECIALTIES
Bore - Oversize
+0.030"
Piston Material
Aluminum
Bore Size
3,437"
Piston Diameter
3,467"
3.467"
Stroke Length
3-31/32"
Compression Ratio
8.5:1
Harley Family
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 Big Twin 1946
Harley Davidson Big Twin 1947
Harley Davidson Big Twin 1948
Harley Davidson Hydra Glide Big Twin 1949
Harley Davidson Hydra Glide Big Twin 1950
Harley Davidson Hydra Glide Big Twin 1951
Harley Davidson Hydra Glide Big Twin 1952
Harley Davidson Big Twin 1941
Harley Davidson Big Twin 1942
Harley Davidson Big Twin 1943
Harley Davidson Big Twin 1944
Harley Davidson Big Twin 1945
Harley Davidson Big Twin 1946
Harley Davidson Big Twin 1947
Harley Davidson Big Twin 1948
Harley Davidson Hydra Glide Big Twin 1949
Harley Davidson Hydra Glide Big Twin 1950
Harley Davidson Hydra Glide Big Twin 1951
Harley Davidson Hydra Glide Big Twin 1952
Harley Davidson Hydra Glide Big Twin 1953
Harley Davidson Hydra Glide Big Twin 1954
Harley Davidson Hydra Glide Big Twin 1955
Harley Davidson Hydra Glide Big Twin 1956
Harley Davidson Hydra Glide Big Twin 1957
Harley Davidson Duo Glide Big Twin 1958
Harley Davidson Duo Glide Big Twin 1959
Harley Davidson Duo Glide Big Twin 1960
Harley Davidson Duo Glide Big Twin 1961
Harley Davidson Duo Glide Big Twin 1962
Harley Davidson Duo Glide Big Twin 1963
Harley Davidson Duo Glide Big Twin 1964
Harley Davidson Electra Glide Big Twin 1970
Harley Davidson Electra Glide Big Twin 1971
Harley Davidson Electra Glide Big Twin 1972
Harley Davidson Electra Glide Big Twin 1965
Harley Davidson Electra Glide Big Twin 1966
Harley Davidson Electra Glide Big Twin 1967
Harley Davidson Electra Glide Big Twin 1968
Harley Davidson Electra Glide Big Twin 1969
Harley Davidson Hydra Glide Big Twin 1953
Harley Davidson Hydra Glide Big Twin 1954
Harley Davidson Hydra Glide Big Twin 1955
Harley Davidson Hydra Glide Big Twin 1956
Harley Davidson Hydra Glide Big Twin 1953
Harley Davidson Hydra Glide Big Twin 1954
Harley Davidson Hydra Glide Big Twin 1955
Harley Davidson Hydra Glide Big Twin 1956
Harley Davidson Hydra Glide Big Twin 1952
Harley Davidson Hydra Glide Big Twin 1953
Harley Davidson Hydra Glide Big Twin 1954
Harley Davidson Hydra Glide Big Twin 1955
Harley Davidson Hydra Glide Big Twin 1956
Harley Davidson Hydra Glide Big Twin 1957
Harley Davidson Duo Glide Big Twin 1958
Harley Davidson Duo Glide Big Twin 1959
Harley Davidson Duo Glide Big Twin 1960
Harley Davidson Duo Glide Big Twin 1961
Harley Davidson Duo Glide Big Twin 1962
Harley Davidson Duo Glide Big Twin 1963
Harley Davidson Duo Glide Big Twin 1964
Harley Davidson Electra Glide Big Twin 1965
Harley Davidson Electra Glide Big Twin 1966
Harley Davidson Electra Glide Big Twin 1967
Harley Davidson Electra Glide Big Twin 1968
Harley Davidson Electra Glide Big Twin 1969
Harley Davidson Hydra Glide Big Twin 1955
Harley Davidson Hydra Glide Big Twin 1956
Harley Davidson Hydra Glide Big Twin 1957
Harley Davidson Duo Glide Big Twin 1958
Harley Davidson Duo Glide Big Twin 1959
Harley Davidson Duo Glide Big Twin 1960
Harley Davidson Duo Glide Big Twin 1961
Harley Davidson Duo Glide Big Twin 1962
Harley Davidson Duo Glide Big Twin 1963
Harley Davidson Duo Glide Big Twin 1964
Harley Davidson Electra Glide Big Twin 1971
Harley Davidson Electra Glide Big Twin 1965
Harley Davidson Electra Glide Big Twin 1966
Harley Davidson Electra Glide Big Twin 1967
Harley Davidson Electra Glide Big Twin 1968
Harley Davidson Electra Glide Big Twin 1969
Harley Davidson Hydra Glide Big Twin 1955
Harley Davidson Hydra Glide Big Twin 1956
Harley Davidson Hydra Glide Big Twin 1957
Harley Davidson Duo Glide Big Twin 1958
Harley Davidson Duo Glide Big Twin 1959
Harley Davidson Duo Glide Big Twin 1960
Harley Davidson Duo Glide Big Twin 1961
Harley Davidson Duo Glide Big Twin 1962
Harley Davidson Duo Glide Big Twin 1963
Harley Davidson Duo Glide Big Twin 1964
Harley Davidson Electra Glide Big Twin 1965
Harley Davidson Electra Glide Big Twin 1966
Harley Davidson Electra Glide Big Twin 1967
Harley Davidson Electra Glide Big Twin 1968
Harley Davidson Electra Glide Big Twin 1969
Harley Davidson Electra Glide Sport Touring 1979
Harley Davidson Super Glide Big Twin 1971
Harley Davidson Super Glide Big Twin 1972
Harley Davidson Super Glide Big Twin 1979