Enhance the performance of your Cummins engine with these high-quality valve inserts. Made from durable materials, these inserts fit perfectly into your engine and ensure optimal valve function. With a set of four inserts, you can improve your engine's efficiency and reduce fuel consumption. These valve inserts are designed specifically for Cummins engines and are compatible with K19, K38, K50, N14, and NT855 models. Manufactured in China, these inserts are of premium quality and are built to last. Upgrade your engine's performance with these valve inserts and achieve better results.