The BBT ignition leads came already longer time with real copper core. We made our ignition leads with a correct thickness, so they fit perfectly in your “snappers” on your cooling fan.We didn’t make ignition leads in silicone, but in the original plastic rubber combination to get that authentic look. Today we’re proud to announce that after buying a zillion kilogram of brown powder, we finally managed to get our spark plug caps (or connector whatever you want to call them) produced in correct brown Bakelite color. Nothing comes even close to BBT original ignition leads. A perfect set of ignition wires, for a right price!