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3-7/8" Standard Bore.
These pistons have been designed to be used with our Twin Cam Performance Heads and can also be used with stock cylinder heads.
- These pistons are forged for higher RPM capability than cast pistons, and come complete with rings, wrist pins and clips
Note
Fits Harley-Davidson '99-'06 Twin Cam 1550 models equipped with 3-7/8" cylinders. All EFI models require ECM calibration* (priced separately). For race application only. These pistons cannot be used in Stroker applications.
