Help with rubbing issues

[Shift_Dr1ft]

Hey everyone, does anyone know what is this black squarish piece with a bunch of square pattern behind the fender liner on the driver side towards the engine? Can I hammer this thing? My tires are rubbing against it. Specs 17x9 +20; s13. Thanks a lot!

[s13 @ fullboost]

is it a s chassis or z????? or a 510 ext

[los_inc]

grind it off. problem solved.

[Shift_Dr1ft]

sorry forgot to mention it's an s-chassis, to be specific a s13. Yeah, I was just wondering if it serves any functional benefits, if not I am just going to hammer away.