Review on PRW 1445500 Performance Quotient Aluminum by Tyrone Carter

When you run a powerful engine in a street car, don't use a traditional stamped impeller replacement pump. This is the best pump you can get for the money. On a Pontiac engine, the clearance between the impeller and the base plate is critical for proper cooling. This pump has a machined impeller similar to the standard cast impeller but with more ribs to increase volume and improve flow.