This head bolt set is designed for V8 engines with 4.6L and 5.4L displacement, supporting both SOHC and DOHC configurations from model years 1991 to 2004. Manufactured from premium alloy steel, these bolts deliver exceptional strength and secure clamping force during high-compression engine operation. Engineered as a direct-fit replacement for factory hardware, this kit includes all bolts needed to service both cylinder heads. Compatible with a wide range of rear-wheel and four-wheel drive platforms using modular 4.6L or 5.4L V8 engines. Ideal for professional engine rebuilders, machine shops, or DIY technicians completing a head gasket job or full overhaul. Delivers OE-level performance at a fraction of the cost, with no core charge or remanufacturing involved. Engine Quest produces high-quality OE-style replacement parts. Each part undergoes rigorous testing and inspections to meet EngineQuest's exact specifications. Designed for precision manufacturing and durability, our products ensure easy installation. With nearly 500 SKUs available, the company specializes in hard-to-find, in-demand parts, including those no longer available from the OEM, difficult to salvage, or with prohibitively high OEM costs.