4.6L/5.4L 2V & 4V modular V-8 engines (will not fit 3V engine)
100% reliable, zero failures in more than 17,000,000 applications. Header fasteners absolutely, positively will not back out. Eliminates need to monitor and tighten bolts regularly
Grade 8 aircraft quality bolts made in U.S.A. Duplex nickel plated