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The Walbro 400LPH fuel pump was designed for engines with more than 500hp that still run on pump gas. Featuring award-winning OE technology from Walbro, these high-pressure, high-flow performance fuel pumps are sure to handle 500hp or more horsepower on most any engine. Some modification is required to the wiring, fuel lines, and fuel module to make it fit your application perfectly. When making your choice for fuel pump purchase, know that Walbro is the leader in the fuel pump field and their pumps currently outperform all other in-tank fuel pumps.