Exhaust Valve Seat. Fits Sportster 1957-1985.
$8.00 RRP (inc GST)
* 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 # 18052-58
OD = 1.757in.
ID = 1.371in.
Thickness = .315in.
MFR PART No: AV-1757S
ROLLIES PART No: AV-1757S