The Nitrous Express 3/8-10 millimeter late model billet fuel line adapter is a must when installing a nitrous system on a late model electronic fuel injection Ford engines. This high flow adaptor makes the chore of tapping factory fuel systems safe and easy. No cutting or drilling just a quick, easy install that takes only minutes and each high flow adaptor has dual outlets for multiple uses. Works on 3/8 and 10 millimeter fuel lines.