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With over 35 years of experience, DNJ® is a full-line provider of high-quality engine components for all makes and models. Renowned for being first to market in the industry and for its comprehensive coverage and reliability, DNJ® is a trusted brand for engine rebuilders worldwide.
Engine Oil Seals
Designed to prevent oil leaks at crankshafts and camshafts. High-temp resistant and precision-molded for long-lasting performance.
Learn MoreExhaust & Intake Manifold Gaskets
Seal the connection between cylinder heads and manifolds. Engineered for exact fit and to withstand extreme heat and pressure.
Learn MoreEngine Gasket Sets
Complete kits containing all necessary gaskets and seals for an engine rebuild. Covers top and bottom-end sealing needs.
Learn MoreEngine Cylinder Head Gaskets
Multi-layer steel or composite head gaskets ensure maximum sealing between cylinder head and engine block under pressure.
Learn MoreCylinder Head Gasket Sets
Includes head gasket and supporting components like valve stem seals and intake/exhaust gaskets—everything for a top-end job.
Learn MoreEngine Auxiliary Shaft Seal / Jet Valve Seal Sets
Precision-molded seals for auxiliary shafts and jet valves to prevent oil leaks and maintain internal pressure balance.
Learn MoreEngine Conversion Lower Gasket Sets
Lower end sealing kits typically used during engine conversion or block servicing. Includes oil pan, rear main, and timing gaskets.
Learn MoreEngine Oil Pan Gasket Sets
Prevent oil leakage at the bottom of the engine block. Made from durable rubber or cork materials to resist deformation.
Learn MoreCrankshaft Rear Main Seals
High-precision rear main seals engineered to handle crankshaft rotation and pressure while preventing oil seepage.
Learn MoreTiming Cover Gasket Sets
Seal timing chain or belt covers to the engine block. Designed to handle oil contact and engine heat cycles without breakdown.
Learn MoreValve Cover Gaskets
Seal valve covers to the cylinder head. Available in rubber, silicone, or cork for different engine types and applications.
Learn MoreValve Stem Oil Seal Set
Seals valve stems to prevent oil from entering the combustion chamber. Crucial for emissions control and engine performance.
Learn MoreWhether you're doing a complete engine rebuild or replacing a single gasket, DNJ® provides the highest quality sealing components for thousands of applications. Trust DNJ® for complete coverage, superior materials, and precision-engineered performance. All components are manufactured to meet or exceed OEM standards for fit and reliability.
