Hard Blok Water Jacket Filler - Tall Fill

The Hard Blok Water Jacket Filler – Tall Fill is a heavy-duty engine cooling system component designed for serious engine builders and performance mechanics who require precision and durability. This product features a tall-profile filler neck that is ideal for custom engine builds, modified intake manifolds, and tight engine bay configurations where standard fillers may not fit.

Constructed to withstand thermal cycling and pressurized cooling systems, the Hard Blok Water Jacket Filler – Tall Fill integrates seamlessly with custom water jacket configurations and high-performance cooling circuits. The tall fill profile measures 10.5 inches in height, ensuring adequate clearance above modified engine components while maintaining proper coolant entry geometry to prevent air trapping and cavitation issues.

Engine builders, fabricators, and restoration shops specializing in performance and custom applications will find this filler neck particularly beneficial. Its robust design is built to handle both atmospheric and pressurized cooling environments, providing reliable long-term operation for various engine configurations.