Chevy V8 Aluminum 90 Degree Water Neck - Polished
Chevy V8 Aluminum 90 Degree Water Neck - Polished
SKU: SKU: SP8456
Out of stock
Product Details
Features
- 90° aluminum water neck for secure upper radiator hose connection
- Fits Chevy Big Block (Mark IV, Gen. V, Gen. VI) and Small Block Gen. I engines
- O-ring seal and mounting hardware included; swivel design
- Polished finish; also available in black and in straight/15°/45° angles
Description
This 90° water neck provides a secure coolant outlet connection between the engine and upper radiator hose. Its aluminum construction with a polished finish supports reliable coolant routing while giving the engine bay a clean, finished look.
The 90° outlet angle helps route the upper radiator hose cleanly in performance, restoration, and custom cooling system layouts. It's designed to create a tight connection at the thermostat housing area, using an included O-ring seal to help reduce leak points. The swivel design allows the outlet to be rotated for hose routing flexibility, and mounting hardware is included.
Applications
Fits Chevrolet Big Block V8 Gen. II (Mark IV) — 396, 402, 454 CID; Gen. V and Gen. VI Big Block — 454 CID; and Small Block V8 Gen. I — 262 through 400 CID. Commonly used in classic and performance vehicles using matching thermostat housing dimensions, street rod builds, and custom cooling system applications.
Installation
Confirm thermostat housing bolt pattern and outlet angle match your application before installing. O-ring seal and mounting hardware are included.
Specs
| Water Neck Material | Aluminum |
| Water Neck Finish | Polished |
| Water Neck Style | 90° |
| Sealing Style | O-Ring (Included) |
| Swivel | Yes |
| Heater Bypass Provision | No |
| Mounting Hardware | Included |
Engine Fitment
COMPATIBLE WITH
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
CHEVROLET BIG BLOCK V8 GEN. II (MARK IV) — STANDARD DECK ONLY
• 6.5 L / 396 in³
• 6.6 L / 402 in³
• 7.0 L / 427 in³
• 7.4 L / 454 in³
NOTES
• Designed to seal at the thermostat housing area — confirm bolt pattern, O-ring sealing style, and outlet angle match your application before installation.
• 90-degree outlet angle is intended for engine bays where hose routing requires a sharper turn toward the radiator — confirm clearance before ordering, as a 90° neck sits differently than the straight, 15°, or 45° variants.
• Not all Chevy small block or big block engines use identical thermostat housing bolt patterns across every year — verify fitment against your specific engine's housing before ordering.
• Standard deck big block applications only — tall-deck big block engines use a different configuration and are not covered by this fitment.
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
Q&A
What does this water neck do?
This water neck provides the coolant outlet connection between the engine's thermostat housing and the upper radiator hose, directing coolant from the engine to the radiator.
What engines is this compatible with?
This water neck is designed for Chevrolet Gen I Small Block V8 (262–400 CID), Gen II Big Block (Mark IV) V8 (396–454 CID), Gen V Big Block V8, and Gen VI Big Block V8 engines.
What angle is this water neck?
This is a 90-degree water neck. TSP also offers straight, 15-degree, and 45-degree versions for applications requiring different upper radiator hose routing.
What finish does this water neck have?
This water neck features a polished finish. A black finish is also available.
Does this include a gasket or seal?
Yes. An O-ring seal is included for installation.
Does this include mounting hardware?
Yes. Mounting hardware is included for installation.
Does this water neck swivel?
Yes. The swivel design allows the outlet to be rotated, making it easier to align the upper radiator hose for a cleaner installation and improved routing flexibility.
Does this include a heater bypass provision?
No. This water neck does not include a heater bypass provision.
Emissions Notice
This product does not affect vehicle emissions and is not subject to emissions compliance regulations.
Chevy V8 Aluminum 90 Degree Water Neck - Polished
This 90° water neck provides a secure coolant outlet connection between the engine and upper radiator hose. Its aluminum construction with a polished finish supports reliable coolant routing while giving the engine bay a clean, finished look.
The 90° outlet angle helps route the upper radiator hose cleanly in performance, restoration, and custom cooling system layouts. It's designed to create a tight connection at the thermostat housing area, using an included O-ring seal to help reduce leak points. The swivel design allows the outlet to be rotated for hose routing flexibility, and mounting hardware is included.
Applications
Fits Chevrolet Big Block V8 Gen. II (Mark IV) — 396, 402, 454 CID; Gen. V and Gen. VI Big Block — 454 CID; and Small Block V8 Gen. I — 262 through 400 CID. Commonly used in classic and performance vehicles using matching thermostat housing dimensions, street rod builds, and custom cooling system applications.
Installation
Confirm thermostat housing bolt pattern and outlet angle match your application before installing. O-ring seal and mounting hardware are included.
COMPATIBLE WITH
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
CHEVROLET BIG BLOCK V8 GEN. II (MARK IV) — STANDARD DECK ONLY
• 6.5 L / 396 in³
• 6.6 L / 402 in³
• 7.0 L / 427 in³
• 7.4 L / 454 in³
NOTES
• Designed to seal at the thermostat housing area — confirm bolt pattern, O-ring sealing style, and outlet angle match your application before installation.
• 90-degree outlet angle is intended for engine bays where hose routing requires a sharper turn toward the radiator — confirm clearance before ordering, as a 90° neck sits differently than the straight, 15°, or 45° variants.
• Not all Chevy small block or big block engines use identical thermostat housing bolt patterns across every year — verify fitment against your specific engine's housing before ordering.
• Standard deck big block applications only — tall-deck big block engines use a different configuration and are not covered by this fitment.
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
Water Neck Material: Aluminum
Water Neck Finish: Polished
Water Neck Style: 90°
Sealing Style: O-Ring (Included)
Swivel: Yes
Heater Bypass Provision: No
Mounting Hardware: Included
