Glow Plug for Powerstroke ZD-12, 3C3Z-12A342-AA SET of 8 Double Filament 6.0L Set of 8 Glow plugs double filament 6.0L Fully tested. One Year US Warranty. Our fault? Get 100% refund! Ships within 24 hours or the next business day. ZD-12, 3C3Z-12A342-AA