Storage Block Off Exh. Plates - Datsun/Nissan

The MOROSO Storage Block Off Exhaust Plates for Datsun and Nissan 6-cylinder engines provide a clean, factory-approved solution for blocking unused exhaust ports. Machined from durable aluminum and finished in natural silver, these one-piece blockoff plates seal port openings when emissions equipment or secondary exhaust systems are removed or deactivated. This exhaust port blockoff eliminates vacuum leaks and unwanted air intrusion that would otherwise compromise engine tuning and emissions control system performance.

Engineered specifically for Nissan 6-cylinder applications, these blockoff plates mount directly to factory exhaust ports without modification. The aluminum construction resists corrosion in typical underhood environments while remaining lightweight. Each plate is individually engineered to fit the exact port geometry, ensuring a complete seal that prevents the air leaks common when ports are left open. Proper blockoff is essential for vehicles running modified or OEM-alternative exhaust configurations where secondary air injection or EGR lines have been relocated or eliminated.

Restoration builders, engine rebuilders, and performance tuners working on Datsun Z-series and classic Nissan inline-6 engines rely on quality blockoff plates to maintain engine vacuum integrity during system modifications. Whether you're restoring original emissions equipment or transitioning to a modern fuel injection retrofit, these MOROSO exhaust port blockoff plates eliminate the hassle of sourcing OEM obsolete components. Installation is straightforward—simply bolt the plate in place and your port is sealed permanently, restoring proper engine bay integrity without additional fabrication or welding.