S&S® forged, 3-1/2" bore replacement pistons for 1984-'99 HD® 80" big twins With S&S® Super Stock Cylinder Heads. 4-1/4" stroke. 10:1 compression. Standard bore size.
XMAS BREAK LAST SHIP DATE 18 DECEMBER
📦All new orders placed after that date will be shipped once we return on the 5th January 2026
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