Overview Reviews Product Description KP50 SPX Stone Fenner Gear Pump PS-5.0 Pump Assembly. 5.0 CC per Rev. 4000 MAX RPM. Kit includes washers and mounting bolts. Mounting bolts are grade 5. Do not substitute. GENUINE SPX PUMP! KP50, KP-50, PS-5.0. PS5.0, PS50 Product Videos Custom Field Product Reviews Write a Review Write a Review × SPX KP50 SPX Stone Fenner Gear Pump Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *