Intake & Exhaust Valve Guide. Fits Big Twin 1948-1979. Standard Outside Diameter.
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* Designed for Harley-Davidson heads
* Same Guide fits Inlet & Exhaust
* Use with OEM style valve seals
* Manganese-Bronze
* High temp viton o-ring seal
* Smooth lead-in
* CNC machined
* Guide ID unfinished
* OD = .566in. Std size
* ID = .375in.
* AV-VGRC-3782 Reamer recomended for AV&V guides & valves
* Replaces OEM # 18138-79