Storage Block Off Exh. Plates SBC 23-Deg Heads

The Storage Block Off Exhaust Plates SBC 23-Deg Heads from MOROSO is a precision-engineered aluminum blockoff plate set designed specifically for Small Block Chevy engines running 23-degree cylinder heads. These plates seal off unused exhaust ports on your engine block, eliminating unwanted air leaks and optimizing breathing efficiency during high-performance operation. Whether you're building a dedicated racing engine or tuning a street machine, blockoff plates are essential when converting between different head configurations or eliminating obsolete casting features that compromise combustion chamber sealing.

Machined from lightweight aluminum in natural finish, this pair of blockoff plates features the precise geometry required for 23-degree Small Block Chevy cylinder head ports. The 1-piece design per plate ensures straightforward installation without complex assembly steps, while the material composition resists thermal cycling and exhaust heat exposure common in engine compartments. At just 0.78 lbs for the pair and compact dimensions (8.35 x 0.9 x 28.3 inches), these plates deliver functional performance without adding unnecessary weight or bulk to your engine package.

Engine builders and performance enthusiasts benefit most from these blockoff plates when transitioning between head manufacturers, upgrading to newer casting designs, or eliminating factory dead-port configurations that reduce volumetric efficiency. Installation is straightforward for anyone with basic mechanical skill—simply bolt the plates to the unused exhaust ports using appropriate fasteners and gasket material. Compatibility is confirmed for Small Block Chevy engines exclusively with 23-degree heads; always verify your cylinder head angle before ordering to ensure proper fit and sealing.