Explore DNJ®’s full line of precision-engineered cylinder block components. Each part is designed to meet or exceed OEM standards for durability, reliability, and performance—supporting rebuilds from the inside out.
Expansion Freeze Plug Sets
Essential for sealing coolant passages in engine blocks. Manufactured with corrosion-resistant materials for long-lasting protection.
Learn MoreHarmonic Balancers
Engineered to dampen crankshaft vibrations and drive accessory belts with precision. Reliable performance under high RPM and load.
Learn MoreIntake Manifolds
Delivering the air-fuel mixture reliably across cylinders. DNJ® manifolds offer direct-fit OE replacements with high-grade materials.
Learn MoreEngine Bearings
Critical engine support components for crankshaft operation. Manufactured with tri-metal or bi-metal construction for wear resistance.
Learn MoreMotor Mount Kits
Engine support and vibration isolation made simple. Each mount is built to OEM specs for reliable fit and performance.
Learn MoreOil Pumps, Timing Covers, and Accessories
Maintain proper oil flow with DNJ® oil pumps and repair kits. High-precision gear tolerances for dependable engine lubrication.
Learn MorePistons, Rings and Kits
Precision-matched piston sets and rings ensure tight compression and reduced blow-by. Designed for OE performance and rebuilds.
Valve Covers
Complete assemblies including gaskets for a leak-free seal. Protect internal components and ensure proper crankcase ventilation.
Learn More