Precision-engineered valve guides designed specifically for Isuzu NQR, NRR, NPR, and NPR-HD models equipped with the 4HK1 5.2L engine (2007-2017). This comprehensive set includes 16 valve guides manufactured to exact specifications for optimal engine performance and longevity. Each guide is crafted from high-grade steel with precise dimensional tolerances to ensure proper valve alignment and smooth operation. These valve guides play a crucial role in maintaining engine efficiency by providing stable support for valve stems and helping regulate oil consumption. The durable construction helps minimize wear and extends service life under demanding conditions. Perfect for professional mechanics and fleet maintenance operations requiring reliable, compatible replacement parts for Isuzu commercial vehicles. Installation should be performed by qualified technicians following proper service procedures.