No pre filter as I am aware, noisy fuel pump not a good thing, are all the rubber bobbin mounts intact? is the pump sitting against anything metal to transmit the sound? can you hear it at normal road speeds when driving 2000rpm ish? Anyway easy fix, big bore stainless steel exhaust, better stereo and speakers or always take a nervous passenger with you when pushing it to the limit, the shrieks and intake of air through pouted lips normally works to dull the buzzing fuel pump noise
P.S. remember to strengthen up the Jesus Christ overhead handle above passenger seat, all the above worked for me.