Piranha Racewerks Intank FPR Delete allows you to remove the regulator that is inside of the fuel assembly basket thats inside of your fuel tank, this regulator has to be removed when doing a return fuel system so you can get the correct siphon from the passenger side of the fuel tank, additional modification is required to the plastic L-shape part as well that connects to the FPR delete. The L-shape has a 1/16th hole which needs to be carefully enlarged to a 5/64th hole.