For use with aftermarket filtration system such as Fass or Air Dog. The perfect addition to your upgraded fuel system, get rid of unnecessary fuel restriction with the Sinister Fuel Filter Bowl Delete. Designed to secure the factory return lines to the motor. This fuel filter bowl delete block creates a ridged mounting area for the return lines equal to the factory filter bowl. Securely mounting the return lines prevents excessive wear compared to any competitors unsecured factory filter delete.