Moroso has introduced valve covers which fit small-block Chevrolet 4.5 Rox bore space cylinder heads. They are part number 68337 and they are 2-3 4" tall, so they clear Jesel and T&D rocker shaft assemblies and allow for greater hood clearance. The valve covers are CNC-machined from a billet aluminum bar. A flat, sturdy rail allows airtight sealing which allows the engine to pull greater vacuum for improved ring seal and power. They are notched at each mounting location with socket-sized clearances for quick removal and installation. Designed with a broad, flat surface for engine builder engraving, the covers can be polished, chromed, powder coated or left as-is for a race look.