6" of additional tire coverage per side. This is the outermost portion of the fender which can mount to the OEM inner fender. We also offer an inner fiberglass structure. With the inner fender structure there is still modifications that are needed. the battery tray area will still need to be reinforced. Also the hood hinge mounts will need to be supported. all holes for remounting all parts to fender will also need to be drilled.