Fits TJ 1999-02 with 2.5L 4 cylinder engines and 1999 TJ with 4.0L 6 cylinder. Mean Greens alternator is the perfect compliment with dual batteries for keeping voltage levels up. Inside, there's a state-of-the-art voltage regulator designed to protect wiring and ignition system. Comes with an unconditional one year warranty. Made in the USA.