Set Of 6 Spring Valve Fits Caterpillar 7S7144 7S-7144Set of Six New Aftermarket Replacement Valve Springs Fits Caterpillar (Fits CAT) 3304 and 3306 Engines This listing includes six (6) new aftermarket replacement valve springs Fits Caterpillar (Fits CAT) industrial and construction engines. Valve springs are critical engine components that maintain proper valve seating and timing in the cylinder head assembly, ensuring accurate valve lift and consistent engine performance under heavy duty operating