Chevy V8 Aluminum 90 Degree Water Neck - Black
Chevy V8 Aluminum 90 Degree Water Neck - Black
SKU: SKU: SP8456BK
In stock
Product Details
Features
- 90° aluminum outlet routes the upper radiator hose through a sharp turn to the radiator
- Swivel design and included O-ring simplify hose alignment and leak-free sealing
- Fits Chevy Gen I small block (262-400 CID) and standard-deck Mark IV big block (396-427 CID)
- Black finish; also offered in black and straight/15°/45° angles
Description
This 90° aluminum water neck creates the coolant outlet connection between the thermostat housing and upper radiator hose, with a black finish that gives the engine bay a clean, finished look. The 90° outlet angle routes the upper radiator hose through a sharp turn toward the radiator, suited to engine bays where straight, 15°, or 45° necks don't provide the routing angle needed.
This water neck is built for Chevy Gen I small block (262-400 CID) engines and standard-deck Gen II (Mark IV) big block engines (396-427 CID) only. Unlike TSP's other water neck angles, this 90° version is not designed for tall-deck big block configurations or Gen V/Gen VI big block engines — confirm your engine's deck height and generation before ordering. It is also not designed for LS-based (Gen III/IV) small block engines.
The swivel design allows the outlet to rotate for hose routing flexibility after installation, and mounting hardware is included.
Engine Applications
Fits Chevrolet Gen I small block V8s from 262 through 400 CID and Gen II (Mark IV) standard-deck big block V8s from 396 through 427 CID — the 427 CID application is unique to this 90° version among TSP's water neck angle options. Tall-deck big block configurations and Gen V/Gen VI big blocks are not covered by this fitment; LS-generation (Gen III/IV) small blocks also use a different housing design and aren't covered.
Installation
Confirm your thermostat housing bolt pattern, deck height, and outlet clearance before installing — the sharp 90° turn sits differently in the engine bay than the straight, 15°, or 45° versions, so verify clearance against surrounding components. The included O-ring seals against the housing face, and the swivel outlet can be rotated after mounting to fine-tune upper radiator hose alignment.
Specs
| Water Neck Material | Aluminum |
| Water Neck Finish | Black |
| 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
CHEVROLET BIG BLOCK V8 GEN. V
• 7.4 L / 454 in³
CHEVROLET BIG BLOCK V8 GEN. VI
• 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 black finish. A polished 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 - Black
This 90° aluminum water neck creates the coolant outlet connection between the thermostat housing and upper radiator hose, with a black finish that gives the engine bay a clean, finished look. The 90° outlet angle routes the upper radiator hose through a sharp turn toward the radiator, suited to engine bays where straight, 15°, or 45° necks don't provide the routing angle needed.
This water neck is built for Chevy Gen I small block (262-400 CID) engines and standard-deck Gen II (Mark IV) big block engines (396-427 CID) only. Unlike TSP's other water neck angles, this 90° version is not designed for tall-deck big block configurations or Gen V/Gen VI big block engines — confirm your engine's deck height and generation before ordering. It is also not designed for LS-based (Gen III/IV) small block engines.
The swivel design allows the outlet to rotate for hose routing flexibility after installation, and mounting hardware is included.
Engine Applications
Fits Chevrolet Gen I small block V8s from 262 through 400 CID and Gen II (Mark IV) standard-deck big block V8s from 396 through 427 CID — the 427 CID application is unique to this 90° version among TSP's water neck angle options. Tall-deck big block configurations and Gen V/Gen VI big blocks are not covered by this fitment; LS-generation (Gen III/IV) small blocks also use a different housing design and aren't covered.
Installation
Confirm your thermostat housing bolt pattern, deck height, and outlet clearance before installing — the sharp 90° turn sits differently in the engine bay than the straight, 15°, or 45° versions, so verify clearance against surrounding components. The included O-ring seals against the housing face, and the swivel outlet can be rotated after mounting to fine-tune upper radiator hose alignment.
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
CHEVROLET BIG BLOCK V8 GEN. V
• 7.4 L / 454 in³
CHEVROLET BIG BLOCK V8 GEN. VI
• 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
