Holley offers a full line of high performance fuel pumps. These Holley electric in-tank fuel pumps have been designed to the highest quality standards to provide increased performance and fuel efficiency for most stock, turbo, and supercharged applications. The 12-962 and 12-963 universal in-tank fuel pumps are intended as an ideal option for engine swaps and supports systems up to 750 horsepower. Both pumps are rated for continuous duty service and have been tested up to 2,500 hours.