Upgrade or service your LS Gen III / Gen IV V8 engine with this complete set of four hydraulic roller lifter retainer trays. Designed as a direct replacement for OEM part numbers 12595365, 12551162, and 12569259, these guides are precision-molded to keep lifters properly aligned and prevent rotation during operation. Each tray is manufactured from durable reinforced plastic and comes with mounting hardware, ensuring a secure fit and reliable performance. This set installs easily without the need for machining, making it ideal for rebuilds, upgrades, or preventative maintenance on V8 engines ranging from 4.8L to 6.2L. Built for strength and long-lasting durability, these lifter trays deliver consistent performance for both stock and performance applications. 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.