Allstar Performance Thermostats, Housings & Fillers

Water Neck, Aluminum, Polished, O-Ring, 15 Degree, Chevy, Big/Small Block/V6, Each

Part Number: AAF-ALL30173

4.66 out of 5 stars ( 41 )

Estimated Ship Date: Today

Water Neck, 90 Degrees, Swivel Style, O-ring Seal, 1.5 in. Outlet, with Hardware, Aluminum, Black Powdercoated, Matte Finish, Chevy, Gen I, Each

Part Number: AAF-ALL30270

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Water Neck, Cast Aluminum, Chrome Plated, O-Ring, 45 Degree, Ford, Small Block, Each

Part Number: AAF-ALL30174

4.5 out of 5 stars ( 18 )

Estimated Ship Date: Today

Water Necks and Thermostat Housings, Billet Water Necks, 90 degree, Swivel, Aluminum, Black Anodized, Chevrolet, Each

Part Number: AAF-ALL30373

Not Yet Reviewed

Estimated Ship Date: Today

Water Neck Spacer, Billet Aluminum, Black Anodized, 1.00 in. Thick, Chevy V8, Each

Part Number: AAF-ALL30375

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

Water Necks and Thermostat Housings, 75 Degree, Swivel Style, Aluminum, Black Powdercoated, Matte Finish, O-ring Seal, with Hardware, Each

Part Number: AAF-ALL30273

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Water Neck, Aluminum, Polished, O-Ring, Straight Up, Chevy, Big/Small Block/V6, Each

Part Number: AAF-ALL30172

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Water Outlet Restrictors, Aluminum, Buick, Chevy, Ford, Oldsmobile, Pontiac, Set of 3

Part Number: AAF-ALL30241

Not Yet Reviewed

Estimated Ship Date: Today

Water Necks and Thermostat Housings, Allstar Performance Aluminum Water Necks, 45 degree, Swivel, Aluminum, O-ring, Each

Part Number: AAF-ALL30271

Not Yet Reviewed

Estimated Ship Date: Today

Water Neck, Inline Thermostat Housing, Remote Mount Style, Aluminum, Black Anodized, 1.500 in. Inlet/Outlet, Uses GM Style Thermostats, Each

Part Number: AAF-ALL31160

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 5, 2026 if ordered today

• Drop Ship
• Special Order

Water Neck, Chevy, Straight, Aluminum, Black Powdercoated, Chevrolet, Each

Part Number: AAF-ALL30272

Not Yet Reviewed

Estimated Ship Date: Today

Water Outlet Restrictor, Aluminum, 0.625 in. I.D., 1.800 in. O.D., Each

Part Number: AAF-ALL30242

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

Water Neck, Low-Profile, 90 degree, Aluminum, Black Anodized, -20 AN Outlet Size, Chevrolet, Each

Part Number: AAF-ALL30381

Not Yet Reviewed

Estimated Ship Date: Dec 26, 2025 if ordered today

• Free Shipping
• Special Order

Water Neck, Low-Profile, 90 degree, Aluminum, Black Anodized, Housing Only, Does Not Include Outlet Fitting, Chevrolet, Each

Part Number: AAF-ALL30382

Not Yet Reviewed

Estimated Ship Date: Dec 26, 2025 if ordered today

• Special Order

Water Neck, Low-Profile, 90 degree, Aluminum, Black Anodized, -16 AN Outlet Size, Chevrolet, Each

Part Number: AAF-ALL30380

Not Yet Reviewed

Estimated Ship Date: Dec 26, 2025 if ordered today

• Free Shipping
• Special Order

Inner Shields, Left Rear Inner Shields Stainless Steel 3in BS

Part Number: AAF-ALL44271

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

• Drop Ship
• Special Order

Allstar Performance billet aluminum water necks fit most Chevy V8, accept most standard thermostats and swivel

Part Number: AAF-ALL30370

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

• Drop Ship
• Special Order

Allstar Performance billet aluminum water necks fit most Chevy V8, accept most standard thermostats and swivel

Part Number: AAF-ALL30371

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

• Drop Ship
• Special Order

O-Ring Water Neck 16AN

Part Number: AAF-ALL30376

Not Yet Reviewed

Estimated Ship Date: Dec 11, 2025 if ordered today

• Special Order

Water Neck, Chevy, Straight, Aluminum, Black Powdercoated, -20 AN Outlet Size, Chevrolet, Each

Part Number: AAF-ALL30377

Not Yet Reviewed

Estimated Ship Date: Dec 26, 2025 if ordered today

• Special Order