1966 Thermostats, Housings & Fillers

Water Neck, Aluminum, Polished, 45 Degree, Chevy, Big/Small Block, Each

Part Number: TRD-6003

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Water Neck, Zinc Alloy, Chrome Plated, O-Ring, 15 Degree, Chevy, Big/Small Block, Each

Part Number: TRD-9228

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Water Neck, Billet Aluminum, Clear Anodized, Straight Up, Chevy, Big/Small Block, Each

Part Number: CSI-970C

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

Water Neck, Aluminum, Polished, O-Ring, Straight Up, Swivel, Chevy 4.3L V6, Chevy V8, Each

Part Number: EDL-4816

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

Block Off Plate, Water Neck, Manifold, Chevy/Mopar, Big Block, Black, Each

Part Number: MEZ-WN0007S

Not Yet Reviewed

Estimated Ship Date: Nov 17, 2025 if ordered today

• Special Order

Water Neck, Aluminum, Chrome, 45 Degree, Chevy, Big/Small Block, Each

Part Number: PRO-141-500

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Today

Thermostat Housing Bleeder; Water Neck Bleeder Plate; Can Be Replacement Part PN[63430/63431]; Incl. Water Nec

Part Number: MOR-63432

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 9, 2025 if ordered today

• Drop Ship
• Special Order

Fitting, Manifold Plate, Straight, SBC/BBC/BBM to 3/4-NPT Female, Aluminum, Polished, Each

Part Number: MEZ-WN0008U

Not Yet Reviewed

Estimated Ship Date: Nov 19, 2025 if ordered today

• Special Order

Thermostat, MotoRad Failsafe, High-flow, 195 degrees, Copper/Stainless Steel, Ford, Each

Part Number: WSN-557295

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Dec 29, 2025 if ordered today

• Special Order

Engine Coolant Thermostat Housing

Part Number: RNB-902-3013

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Water Neck, Radiator Cap Filler Neck Style, Billet Aluminum, Clear Anodized, Chevy, Each

Part Number: CVS-TSH3CL

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

• Drop Ship
• Special Order

Water Neck, Steel, Silver, Chevrolet, GMC, Each

Part Number: SNN-CH3055

Not Yet Reviewed

Estimated Ship Date: Dec 1, 2025 if ordered today

• Special Order

Water Neck Block Off, Aluminum, Black Anodized, Chevy, Small Block, Each

Part Number: CTR-80-110

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

• Special Order

Water Neck, Zinc Alloy, Chrome Plated, O-Ring, 45 Degree, Chevy, Big/Small Block, Each

Part Number: TRD-9229

Not Yet Reviewed

Estimated Ship Date: Jan 27, 2026 if ordered today

• Special Order

Water Neck and Thermostat Housing, Stock, Steel, Natural, Chevrolet, Each

Part Number: RNB-902-2057

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

• Special Order

Water Neck, Billet Aluminum, Natural, -16 AN Male, Straight Up, Chevy, Big/Small Block, Each

Part Number: CTR-80-100

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

• Drop Ship
• Special Order

Thermostat, Insert - Mercedes Benz, 1966-1968 2.5L, 1968-1971 2.8L

Part Number: MAH-TX10330

Not Yet Reviewed

Estimated Ship Date: Dec 17, 2025 if ordered today

• Special Order

Water Neck, Steel, Silver, American Motors, Jeep, Oldsmobile, Each

Part Number: SNN-CH4809

Not Yet Reviewed

Estimated Ship Date: Nov 21, 2025 if ordered today

• Special Order

Thermostat, MotoRad Failsafe, High-flow, 195 degrees, Copper/Stainless Steel, Buick, Cadillac, Chevy, Pontiac

Part Number: WSN-557195

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

• Drop Ship
• Special Order

Water Neck, Cast Aluminum, Copper Plated, O-Ring, 15-Degree, Chevy, Big/Small Block, Each

Part Number: SUM-371102CPR

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Water Neck Base, Black Anodized, Mopar, Big Block, Each

Part Number: MEZ-WN0029S

Not Yet Reviewed

Estimated Ship Date: Today

Thermostat-170 Degrees w/ Seals

Part Number: SNN-880070

Not Yet Reviewed

Estimated Ship Date: Dec 1, 2025 if ordered today

• Special Order

Water Necks and Thermostat Housings, Replacement, Stock Style, Aluminum, Natural, Chevrolet, GMC, Jeep, Each

Part Number: ADO-15-10179

Not Yet Reviewed

Estimated Ship Date: Dec 3, 2025 if ordered today

• $20.00 Summit Bucks
• Special Order

Thermostat, Spec-R, 160 Degrees F, Steel/Copper, Universal, Each

Part Number: SNN-MRD101

Not Yet Reviewed

Estimated Ship Date: Today

Fail-Safe Thermostat Kit- 192 Degrees w/ Gasket

Part Number: SNN-4831KTFS

Not Yet Reviewed

Estimated Ship Date: Dec 1, 2025 if ordered today

• Special Order