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IAG Stage 2 CNC Ported Blueprinted EJ25 11mm Oil Pump - FastWRX.com
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Ported oil pumps, what you need to know. – Bad Guys
TracTuff Type S Oil Pump Conversion, K-Series Engines (EXCEPT K24Z Engines), w/ Porting Service
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Ported oil pumps, what you need to know. – Bad Guys
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Oiling Systems for Grassroots Racing - Engine Builder Magazine
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4P K-Series oil pump for high rpm applications. Also available for B-Series, H22, and EVO X http://www.4pistonracing.com/k20-k24-ported-type-s- oil-pump | By 4 Piston Cylinder Heads | Facebook
Power Dynamics Ported High Flow Oil Pump for LS Engines – Full Throttle Speed
