Cometic O-rings

11 products — part of all O-rings

Cometic O-rings for Harley-Davidson are precision-dimensioned sealing components from the manufacturer whose head gaskets have become the performance standard for V-twin engine builds. The O-ring is a deceptively simple component — but an O-ring of the wrong durometer, inner diameter, or cross-section will fail under the thermal cycling and pressure of a Harley-Davidson engine and fuel system, creating leaks that are difficult to trace. Cometic supply O-rings sized and compounded for the specific applications they're catalogued against: fuel petcock O-rings, oil system O-rings, and engine sealing points across Evolution, Twin Cam, Milwaukee-Eight, and XL Sportster applications. Iron City Motorcycles stocks Cometic O-rings for the Harley-Davidson mechanic who understands that sealing is only as good as the material and dimensions of the seal. Browse the full Cometic O-rings range below.