Nissan Stagea C34 Cylinder Head Coolant Passage Plug RB26/25/20

The Nissan Stagea C34 Cylinder Head Coolant Passage Plug for RB26, RB25, and RB20 engines is a high-precision component designed to ensure the integrity of the engine’s cooling system. Positioned in threaded ports along the intake or exhaust sides of the cylinder head, this taper plug, also called a blind thread or coolant gallery sealing plug, securely closes the ends of the internal coolant passages. By preventing leaks and maintaining proper coolant circulation, it protects the engine from overheating, corrosion, and hot spots, which is essential during high-boost or high-RPM operation typical of RB-series engines.

Crafted from durable steel with an M12x1.25 thread and a slight taper, the plug expands slightly when torqued, creating a reliable, gasket-free seal. This precise fit ensures consistent coolant pressure, prevents air ingress, and maintains efficient thermal management, safeguarding vital components such as the combustion chambers, valves, and exhaust ports. It is commonly inspected or replaced during cylinder head servicing, resurfacing, or full engine rebuilds to avoid stripped threads or leaks that could compromise performance.

Terra Firma Automotive provides only genuine Nissan Cylinder Head Coolant Passage Plugs, guaranteeing OEM-standard quality and fitment. Using the correct plug ensures optimal cooling system performance, protects critical engine components, and maintains the reliability, durability, and high-performance capabilities of Nissan Stagea C34 engines for both street and performance applications.

• 6 Required Per Cylinder Head
• Sold As Each
• Not For RB20E Single Cam Motors
• 20mm Wide
• 10mm High
• M12x1.25 Thread