Exhaust Valve Seat. Fits Big Twin 1966-1984.
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8 in stock
- Estimated Delivery : Up to 4 business days
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* Easy oversize identification by the part number
* Easy to machine with cutter and stone
* Resists severe pounding and dissipates heat better
* Work-hardens during running-in
* Radiused for easier installation
* Replaces OEM # 18010-79
* Replaces OEM # 18017-66
* Replaces OEM # 18020-79
* Replaces OEM # 18055-66B
OD = 1.944in.
ID = 1.570in.
Thickness = .400in.
