Straight Water Neck Polished

The Straight Water Neck Polished (ALL 30172) by ALLSTAR PERFORMANCE is a precision-engineered cooling system component designed for Chevy V8 engine builds and modifications. This aluminum water neck serves as the critical junction between your engine block and radiator hose, directing coolant flow with zero restrictions or turbulence. Whether you're restoring a classic small-block or building a modern LS engine swap, a quality water neck eliminates weak points that often leak or corrode in factory setups, making it an essential upgrade for any serious engine work.

This straight-design water neck features a 1-1/2 inch ID hose connection and utilizes an O-ring seal system for superior leak prevention compared to traditional gasket designs. The polished aluminum construction resists corrosion while maintaining a clean, professional appearance under the hood—no powder coating to chip or fade. O-ring technology eliminates the need for messy gasket compound or repeat failures; the seal compresses uniformly every time, delivering consistent pressure retention across temperature cycles. Hardware is included, allowing immediate installation without hunting for metric or SAE fasteners from aftermarket suppliers.

Mechanics and engine builders trust this component for Chevy V8 applications ranging from 350 small-blocks to modern LS variants. Installation is straightforward: simply bolt the water neck to the engine block and connect your upper radiator hose to the 1-1/2 inch outlet. The straight configuration ensures smooth coolant transition with minimal turbulence, preventing hot spots that cause detonation in high-compression or forced-induction builds. At 0.71 lbs, it adds negligible weight while improving reliability—ideal for street machines, race engines, and restorations where cooling system integrity directly impacts engine longevity.