6.0L V8 Cylinder Heads #317 - Assembled Pair with Valves & Springs | Fits 2001-2014 Models | High-Performance Aluminum Construction

Description: Upgrade your 6.0L engine with this high-performance pair of assembled cylinder heads, specifically designed for LQ4 and LQ9 engines. Engineered with precision, these aluminum heads (Casting #317) are an ideal replacement for worn or damaged parts, providing enhanced durability and optimal performance for compatible models from 2001 to 2014. Each head is meticulously assembled with brand-new components, including valves, springs, seals, and retainers. The reinforced deck design ensures added strength, while improved water flow and thermal conductivity protect your engine in high-stress conditions. Precision-machined guides and seats, combined with a 3-angle valve finish, optimize airflow, boosting horsepower and efficiency. Whether you’re restoring a truck, SUV, or van, these cylinder heads offer the perfect solution for high-power applications. Built for reliability and longevity, they’re designed to resist cracking and withstand rigorous use. Key Features: - Direct replacement for casting #317 - Fully assembled with new valves, valve springs, seals, and retainers - Precision CNC machining for increased flow and performance - Enhanced durability with a reinforced aluminum deck - Hardened exhaust seats for extended life - Fits a wide range of compatible 6.0L vehicles from 2001-2014 Bring your engine back to life with this premium pair of cylinder heads, designed for high-performance reliability. 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.

• High-Performance Fitment: Assembled 6.0L V8 cylinder heads #317, designed for compatibility with LQ4 and LQ9 engines in models from 2001-2014.
• OEM Quality & Compatibility: Direct replacement for casting #317, interchangeable with parts like #12562319 and #12562317, ensuring a perfect fit for compatible models.
• Enhanced Durability: Manufactured with premium aluminum, featuring a thicker deck for greater strength and improved heat conductivity for long-lasting performance under high-stress conditions.
• Fully Assembled with New Components: Includes new OE-type valves, valve springs, seals, and retainers for optimal performance out of the box—ideal for high-power LS engine builds.
• Precision Engineering: CNC-machined guides and seats with a 3-angle valve finish for superior airflow and increased power output. Hardened exhaust seats resist wear for enhanced durability.
• Engineered for Optimal Flow: Improved water flow design for better thermal management, preventing overheating and boosting reliability in performance applications.
• EngineQuest: Over 75 Years of U.S. Automotive Expertise – Designed in the USA with Top-Quality Control. Proud IMCA/WISSOTA Supporter. Backed by a 1-Year Parts & Labor Warranty.