Upgrade your Isuzu truck's engine performance with this complete set of 16 valve oil seals designed specifically for NRR, NQR, NPR-HD, and NPR models equipped with the 4HK1 5.2L engine (2004-2011). These precision-engineered seals are crafted to provide superior protection against oil leakage and maintain optimal engine compression. Each seal features a durable construction components that ensure long-lasting performance under demanding conditions. The set includes all necessary seals for a complete valve train service. These replacement seals are designed to match the exact specifications of your Isuzu commercial truck, ensuring proper fitment and reliable sealing performance. Perfect for fleet maintenance or individual truck repair projects, these valve seals are essential components for maintaining your engine's efficiency and longevity.