
Big Bore Drag Specialties Piston designed for Twin Cam engines, manufacturer reference 22661-99A-005. Ideal for vintage restorations or road/touring builds, this oversized piston meets the needs of riders replacing worn parts or fitting a big bore kit on high-displacement V-Twins.
Designed for a precise fit on oversized bore, this piston integrates into Twin Cam engine rebuilds where a reliable replacement conforming to +0.005" bore specifications is sought. It is aimed at Harley-Davidson owners looking to maintain the vintage spirit while ensuring mechanical compatibility during an engine overhaul.
Examples of compatible motorcycles (non-exhaustive): Harley-Davidson FLSTFI 1550 Fat Boy 15th Anniversary (2005), FLHRSEI 1550 Road King Screamin' Eagle (2002), FLTRSEI 1550 Road Glide Screamin' Eagle (2000).