Screamin' Eagle 4" BIG BORE BOLT-ON CYL. PISTON - 92500039
Fitment:Fits 2007 and later Twin Cam models with 4-3/8 stroke flywheel. Cannot be installed on CVO 110 FLSS or FLSTFB 110 models or models with engine cases that have been machined to accept large bore cylinder. Twin Cooled models require separate purchase of model specific head gaskets.