This pack of 4 manifold studs is compatible with FORD 2007/11 Crown Victoria & Mercury Marquis 4.6L, FORD 2004-2014 F-150, and 05-10 Mustang 4.6L. The studs are an interchange part number W707747S431 and an OE/OEM part number W707747-S431. The manufacturer part number is W706194-S415. The pack includes only the stud, and there is no warranty from the manufacturer. This item falls under eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories, Exhaust & Emission Systems, and Manifolds & Headers categories.