This is a great part to get to finish that brake restoration project on your Porsche 356b. Brake lines need to be replaced after so many years of use, and performance. If you change your brake fluid and the lines are dirty from so many years, it 's a good idea to change them giving you better stopping power. This is a new steel brake line with the vinyl protector that 's not loose like others being sold where debris and water can enter through the vinyl. Our vinyl protection is just like o.e. Our steel brake lines come with zinc screw ends, even more rust protection, and all lines have rust resistant lubricant on the flare ends. This insures no rust and moisture when installing them on your car. This steel brake line will fit on your Porsche 356bt5 & 356bt6 on the right rear side.