Storage Block Off Exh. Plates - Honda/Acura

The MOROSO Storage Block Off Exhaust Plates for Honda and Acura B-Series engines provide a clean, professional solution for sealing unused exhaust ports when running a modified exhaust configuration. Fabricated from lightweight aluminum in a natural finish, this one-piece blockoff plate pair eliminates the appearance of open ports while maintaining engine bay aesthetics and preventing unwanted air ingestion into sealed exhaust passages.

Designed specifically for Honda B-Series engines, these blockoff plates are engineered to fit precisely where secondary or auxiliary exhaust ports would otherwise remain exposed after manifold or header modifications. The aluminum construction resists corrosion and oxidation while remaining lightweight enough to have no meaningful impact on engine weight distribution. The natural aluminum finish integrates seamlessly with stock or custom engine components, and can be polished or powder-coated if a different aesthetic is desired. Each pair is ready for installation with no additional modification required.

Honda B-Series engine builders, street tuners, and track enthusiasts commonly use exhaust blockoff plates when transitioning to single-outlet or high-performance header setups. By sealing unused ports, these plates prevent exhaust leaks that can compromise scavenging efficiency and introduce unmetered air into the system. This solution is standard practice in competition engine builds and modified street vehicles where port configuration changes but OEM appearance or functional integrity must be preserved.

MOROSO is an established manufacturer of engine dress-up and performance components for import and domestic platforms, known for precision fitment and durable materials in the engine modification market.