Professional Racing Coil, 15% More energy than OE coils. Guarantee 100,000 miles Compatible to F523, 5C1412, E213, E262, E409, 52-1761, IC369, IC62, 1L2U12029AA, 1L2Z12029AA, 1L5Z12029AA, 3W7E12A366AA, 3W7Z12029AA, F7TU12029BA, F7TU12A366AB, F7TU12A366BA, F7TZ12029AB, F7TZ12029BA, F7TZ12029CA, F7TZ12029CC, 88921369, DG481, DG491, DG508, FD-493, FD-503, FD-507 Better acceleration a smoother idle and Improved fuel mileage, Delivers more torque quicker starts ,Instant throttle response Engineered for professional racing application. 5 Years Warranty ! Money-Back Guarantee, If you're not satisfied, return back to us, no-hassle refund or product replacement.