Water Bypass Kit - GM

The Water Bypass Kit - GM by Edelbrock is a precision-engineered aluminum water neck spacer designed to manage coolant flow dynamics in GM V8 engine builds. This kit serves as a critical component for engine builders and enthusiasts who need to integrate auxiliary cooling lines or modify factory water circulation patterns. Whether you're upgrading to an aftermarket cooling system, installing a remote oil cooler, or reconfiguring your heater circuit for performance applications, this water bypass kit provides the manifold ports and spacing required to integrate bypass lines without compromising factory cooling integrity.

Machined from durable aluminum and finished in natural (unpainted) form, the kit features a 1-1/8 inch thickness that positions the intake manifold water outlet at the correct height for modern cooling hose routing. The dual 3/8 inch NPT ports allow simultaneous connection of bypass lines and fitting—critical for applications where you need to route coolant to auxiliary components like transmission coolers, turbo intercoolers, or custom heater circuits. The NPT (National Pipe Thread) standard ensures reliable, leak-free connections with industry-standard fittings, while the aluminum construction provides thermal stability and corrosion resistance in long-term engine operation. Compact dimensions of 7.7 x 2.3 x 7.9 inches make installation straightforward without requiring extensive manifold modification.

This water bypass kit is ideal for Chevy V8 engine builders performing cooling system upgrades, performance builds with additional cooling demands, or custom cooling circuit installations. Installation requires only basic tools and fits directly between the engine block and intake manifold water outlet—no drilling or fabrication needed. The kit is compatible with both traditional carbureted and modern fuel-injected Chevy V8 applications, making it a versatile solution for restoration projects, hot rods, race engines, and street performance builds where precise coolant management is essential. Verify your specific engine block configuration and intake manifold compatibility before ordering to ensure proper fitment.