DynoCams ProductsDucar EnginesBriggs and Stratton EnginesHarbor Freight EnginesClone 13hp EngineEngine ToolsCharger Racing ChassisKarting AccessoriesMeasurement DevicesTillotson CarbsTire PrepLubricants Categories HomeDynoCams ProductsRingsFlathead Rings DC-TR20 Compression Ring, +.020, Flathead $4.25