These 3-7/16" .090" bore, low compression stroker pistons are part of an S&S stock bore stroker kit for 1936-'84 HD® big twins, and are designed to be used in conjunction with S&S® stroker flywheels. Flywheels of the following strokes may be used for the following displacements: 4-1/2" stroke - 84" @ 7.3:1 compression, 4-5/8" stroke - 86" @ 8.0:1 compression, 4-3/4" stroke - 88" @ 9.0:1 compression.
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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