HS900 — Engine Cylinder Head Spacer Shim

DNJ Cylinder Head Shims are engineered to restore correct engine geometry and maintain optimal compression ratios, particularly after resurfacing the cylinder head or engine block. These precision-machined spacers are manufactured to exact tolerances, ensuring accurate fitment, reliable sealing, and consistent performance. With a thickness of 0.020 and intended for use on the block side, each shim is designed for specific engine applications and features precisely aligned cutouts for bolt holes and fluid passages. DNJ Cylinder Head Shims are made from premium-grade stainless or spring steel to withstand the intense heat, pressure, and chemical exposure of modern engines. These materials are selected for their superior tensile strength, corrosion resistance, and dimensional stability, even under extreme thermal cycling. Optional elastomer or graphite-based coatings may be applied to enhance sealing properties and resist oil and coolant intrusion. Every shim is manufactured to meet or exceed OEM quality standards, ensuring sealing and long-lasting engine protection. DNJ also proudly offers the largest inventory of MLS cylinder head gaskets in the industry, ensuring coverage for a wide range of domestic and import vehicles. To complement its sealing technology, and to complete the job, DNJ also offers a complete line of Head Bolts, which is critical for proper cylinder head installation. It is important to note that Torque-To-Yield (TTY) head bolts must never be reused, as reinstallation can compromise clamping force and lead to engine failure. With precision engineering and top-tier materials, DNJ Cylinder Head Shims deliver exceptional performance and long-lasting durability.