Regardless of the dia. the Firecore wires have a different sheen and overall look as compared to OEM wires, there's really no way you'd get them to look exact to OEMs regardles of boots or stampings. However, I'd still like to get some Firecores with the factory style stamping because even if not 100% correct, they'd look right to most onlookers keeping a generally correct the factory "look"