Water Neck 1997-up GM V ortec & LS 4.8L - 7.0L S

The Water Neck Straight for 1997-up GM V8 Vortec and LS-series engines (4.8L–7.0L displacement) from Specialty Products Company is a polished aluminum coolant outlet designed for marine and automotive applications requiring reliable high-temperature fluid management. Part number 8623 delivers a direct replacement for factory cooling systems with superior corrosion resistance, critical for saltwater and freshwater boating environments.

This water neck features a 1-1/2 inch ID hose connection with an integral O-ring seal, eliminating the need for separate gasket materials and reducing potential leak points. The polished aluminum construction resists oxidation better than painted alternatives, particularly in marine applications where exposure to humidity and saltwater spray accelerates corrosion. The straight outlet configuration simplifies plumbing and provides predictable flow dynamics for cooling system integration on LS-series powered boats and vehicles.

Buyers upgrading or restoring LS-powered boats, ski boats, and marine-duty trucks rely on this component as a maintenance or performance upgrade. Weekend boaters and serious offshore anglers both benefit from improved reliability and durability compared to corroded OEM water necks. The GM LS-series platform's popularity in marine conversions makes this Specialty Products Company water neck an essential replacement part for anyone maintaining LS cooling systems in saltwater or demanding freshwater conditions.

Specialty Products Company specializes in cooling system components engineered for high-performance and marine applications. The SPC8623 water neck is a direct fit for all LS Vortec engines between 1997 and current model years, making it a go-to choice for marine engine builders and restoration shops working with small-block and big-block LS platforms.