Twin Power™ starter to primary O-ring replaces H-D 27444-00Y for 2006-2017 Big Twins excluding M8 models, sold as a 5-pack for reliable sealing.

• Direct OEM replacement prevents oil leaks between starter and primary cover on Twin Cam engines
• High-quality rubber O-ring ensures proper compression and long-term sealing under vibration
• 5-pack provides spares for multiple rebuilds or service intervals
• Excludes Milwaukee-Eight™