Leaking oil around the valve cover bolts on your 4V DOHC 4.6 or 5.4/5.8 ? Then simply removing the bolt and installing these new seals will fix you right up - Valve cover removal not required! Features: QTY 20 included to replace all seals on 1 engine Improved Material Seals better and lasts longer Fits: All 4.6 DOHC Cobra / Mach One / Mark 8 All 5.4 / 5.8 Navigator and GT500