This 15° water neck is designed to provide a secure coolant outlet connection between the engine and upper radiator hose. Its zinc construction with a chrome finish supports reliable coolant routing while giving the engine bay a clean finished look.

15° Outlet Configuration
The outlet angle helps route the upper radiator hose cleanly in performance, restoration, and custom cooling system layouts.

Secure Hose Connection
Designed to create a tight connection at the thermostat housing area to support reliable coolant flow and help reduce leak points.

Zinc Construction
Built from zinc to handle coolant system heat, pressure, and repeated service conditions.

Application-Specific Cooling Fitment
Designed for the listed engine family and sealing style, with fitment verified by the product dimensions and specifications.

COMPATIBLE WITH
CHEVROLET BIG BLOCK V8 GEN. II (MARK IV)

• 6.5 L / 396 in3
• 6.6 L / 402 in3
• 7.4 L / 454 in3

CHEVROLET BIG BLOCK V8 GEN. V

• 7.4 L / 454 in3

CHEVROLET BIG BLOCK V8 GEN. VI

• 7.4 L / 454 in3

CHEVROLET SMALL BLOCK V8 GEN. I

• 4.3 L / 262 in3

• 4.3 L / 265 in3

• 4.4 L / 267 in3

• 4.6 L / 283 in3

• 4.9 L / 302 in3

• 5.0 L / 305 in3

• 5.0 L / 307 in3

• 5.4 L / 327 in3

• 5.7 L / 350 in3

• 6.6 L / 400 in3

NOTE: Be sure to determine correct water neck angle, as radiator hoses vary between applications.

COMMON VEHICLE APPLICATIONS

• Classic and performance vehicles using matching thermostat housing dimensions
• Street rods and custom cooling system applications
• Engine builds requiring the listed water neck angle and sealing style

Specifications: