S&S Cycle Crankcase Breather Valve for 2003-2006 Harley-Davidson Twin Cam A

S&S Cycle Crankcase Breather Valve for 2003-2006 Harley-Davidson Twin Cam A

Crankcase oil carryover in Twin Cam A engines dirties air cleaner elements and increases emissions over time. This S&S Cycle breather valve installs in the crankcase to address oil carryover at the source, keeping the air cleaner dry and the engine breathing cleanly. A direct-replacement fix, it restores proper crankcase ventilation without requiring machining or additional modifications.

Key Features

• Addresses oil carryover from the crankcase in 2003-2006 Twin Cam A engines with stock oil pump
• Precision reed valve design controls crankcase pressure and reduces oil mist entering the air cleaner
• Direct replacement installation – no machining required
• Not for use with Feuling oil pumps
• Made in the USA by S&S Cycle

Technical Specifications

• Application: 2003-2006 Twin Cam A with stock oil pump
• Valve Type: Reed valve
• Country of Origin: USA

Fitment Notes

• Fits 2003-2006 Harley-Davidson models with the Twin Cam A engine and stock oil pump only
• Not for use with Feuling oil pumps – incompatible with high-volume aftermarket oil pump configurations
• Review the Fitment tab for complete year and model breakdown