The WCF Hi-Flo Fuel Pump is a necessary addition when converting your Fiero to a high output engine. The stock Fiero fuel pump produces 50 PSI pressure and delivers 16 gallons of fuel per hour. The high flow fuel pump produces 51 PSI and delivers 24 gallons of fuel per hour. The ultra-high flow fuel pump produces 51 PSI and delivers 50 gallons of fuel per hour. This 50% increase in delivery capacity will prevent your engine from starving during high fuel demand situations.