Radium Fuel Pump Adapter For Walbro F90000267 / F90000274 Pumps OnlyThis 6AN male adapter is used to integrate a high flow check valve on the outlet of many fuel pumps. The valve out flows the integrated check valve that comes standard on many fuel pump outlets. Furthermore, decreasing this restriction allows the pump to operate at less current. This keeps fuel temperatures lower and prevents cavitation. The two billet aluminum adapter halves are secured together with a stainless steel retainer and bolts that clamp