DJ Rock HGS426 Engine Cylinder Head Gasket Set

Engine Cylinder Head Gasket Set for Mazda

DJ Rock HGS426 is a premium engine cylinder head gasket set for top-end engine service and cylinder head replacement. Built around an 83 mm cylinder bore diameter, it provides the sealing needed to maintain combustion pressure and control oil, coolant, and exhaust leaks.

Compatible with 1998-1999 Mazda 626 and 1999-2000 Mazda Protege, this set supports detailed reassembly work on the upper engine. It cross-references MAHLE HS5942A for the same application.

Key Features

• Premium-grade head gasket set for upper engine sealing
• 83 mm cylinder bore diameter
• Non-asbestos sealing materials
• Designed to meet or exceed OEM quality standards
• Supports Mazda 626 and Mazda Protege engine service
• DJ Rock HGS426 part number for catalog matching

Detailed Product Overview

DJ Rock HGS426 is engineered for cylinder head replacement and complete top-end resealing. The set is built to restore sealing integrity between the cylinder head and engine block, helping maintain compression while sealing critical oil, coolant, and gas passages. Material selection follows the application, with sealing components designed for heat, pressure, and fluid exposure in modern engine service.

This part number is a direct match for 1998-1999 Mazda 626 and 1999-2000 Mazda Protege applications listed in the fitment data. If you are searching for a Mazda Protege head gasket set or a Mazda 626 engine cylinder head gasket set, HGS426 is the catalog reference to use.

What It Helps Address

• Head gasket leaks causing compression loss
• Coolant seepage between the head and block
• Oil leakage from upper engine sealing surfaces
• Combustion gas leakage at the cylinder head interface
• Sealing issues during cylinder head replacement or valve service

Installation Notes and Tips

Clean all mating surfaces thoroughly before assembly and verify cylinder head and block condition before installation. Follow the vehicle service manual for torque sequence, torque values, and any angle-tightening procedure. Replace torque-to-yield head bolts rather than reusing them, since clamping force can be reduced after removal.

For fitment confirmation, use the vehicle year, make, model, and engine details against the application listing for 1998-1999 Mazda 626 and 1999-2000 Mazda Protege.

Quality Assurance

DJ Rock HGS426 is built as a premium sealing solution using non-asbestos materials and OEM-level design targets. The set is intended for professional engine repair where consistent sealing performance is required across the cylinder head, intake, exhaust, and valve cover interfaces.