Thermostats, Housings & Fillers

Water Neck, Steel, Chrome Plated, 45 Degree, Oldsmobile, V8, Each

Part Number: SUM-376003

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025

Thermostat Housing Crossover, Aluminum, Ford, 351W, Cleveland Heads, Kit

Part Number: TFS-51600600

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 8/25/2025

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

Part Number: SUM-371102B

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025

Water Neck, Thermostat Housing, Aluminum, Natural, Gasket Style, Each

Part Number: RNB-902-2014

4.17 out of 5 stars ( 6 )

Estimated Ship Date: Monday 8/25/2025

Radiator Hose Filler, Inline, Aluminum, Natural, -12 AN to -12 AN, Each

Part Number: CSI-975

Not Yet Reviewed

Estimated Ship Date: Monday 8/25/2025

Water Neck, Aluminum, Polished, Straight Up, 1.50 in. Hose, GM, LS Engine, Each

Part Number: MRG-2671NA

3.67 out of 5 stars ( 6 )

Estimated Ship Date: Monday 8/25/2025

Radiator Hose Filler, Inline, Aluminum, Natural, 1.5 in./1.5 in., Each

Part Number: HRE-3423

4.61 out of 5 stars ( 36 )

Estimated Ship Date: Monday 8/25/2025

Water Neck, Billet Aluminum, Clear, 90 Degree, Swivel, Chevy, Each

Part Number: SUM-371110-CL

3.67 out of 5 stars ( 6 )

Estimated Ship Date: Monday 8/25/2025

Water Outlet Restrictors, Aluminum, Includes One 5/8 in., One 3/4 in., and One 1 in. Restrictor, Chevrolet, Ford, Set of 3

Part Number: SUM-380850

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 8/25/2025

Water Neck, 75 degree, Swivel, O-ring Sealing Style, Aluminum, Black Anodized, 1.5 in. Outlet, Chevy, Chrysler

Part Number: MEZ-WN1022S

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025

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Thermostat, 160 Degree, Bypass Valve, Copper/Brass, GM, Each

Part Number: SUM-367-160

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025

Water Manifold, Gen. 3 and 4 LS, 7-port at sides, upper and front, -12 AN ORB plugs, M-12 x 1.5 AND 3/8 NPT temp sensor provisions, Red, Each.

Part Number: SUM-390LSRED

Not Yet Reviewed

Estimated Ship Date: Monday 8/25/2025

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Chevy, Big/Small Block, Each

Part Number: CSI-911AN20C

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025

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Water Neck Spacer, Billet Aluminum, Polished, Chevy, Mopar, Big Block, Small Block, Each

Part Number: MEZ-WN0028U

4.39 out of 5 stars ( 23 )

Estimated Ship Date: Monday 8/25/2025

Water Neck, Offset Adapter Style, Billet Aluminum, Black Powdercoated, Chevy, Each

Part Number: CHH-3300-001B

Not Yet Reviewed

Estimated Ship Date: Monday 8/25/2025

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Water Neck Thermostat Housings, Replacement, Aluminum, 1.50 in. Outlet, O-ring Seal, with Thermostat, for LT/LS Mid-Mount Accessory Drive Only, Each

Part Number: HLY-97-169

Not Yet Reviewed

Estimated Ship Date: Monday 8/25/2025

Thermostat, Mechanical, OE, 185 degrees, Standard-flow, Copper/Brass, Each

Part Number: ADO-131-156

3.9 out of 5 stars ( 10 )

Estimated Ship Date: Monday 8/25/2025

• $20.00 Summit Bucks

Water Necks and Thermostat Housings, 90 degree, Swivel, Aluminum, Polished, 1.500 in. Outlet Size, Chevrolet, Small Block LS, Each

Part Number: MCH-BTH-212-05

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 8/25/2025

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Thermostat, Mechanical, Thermostat with Seal, Standard-flow, 180 degrees F, Copper/Stainless Steel, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Each

Part Number: SNN-523-180

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025

Thermostat, 180 Degrees Opening Temperature Rating, Copper/Steel, Gaskets, Cadillac, Chevy, GMC, Pontiac, Each

Part Number: LPE-L310055204

2.43 out of 5 stars ( 7 )

Estimated Ship Date: Monday 8/25/2025

THERMOSTAT HOUSING, THRMST HSG SWVL 15 DEG LS 2010-UP POL

Part Number: BSP-90335

Not Yet Reviewed

Estimated Ship Date: Monday 8/25/2025

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Chevy, Big/Small Block, Each

Part Number: CSI-911AN16C

Not Yet Reviewed

Estimated Ship Date: Monday 8/25/2025

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Water Neck, Aluminum, Natural, Each

Part Number: ADO-15-10412

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 8/25/2025

• $20.00 Summit Bucks

Water Neck, Billet Aluminum, Black Anodized, Swivel, Radiator Cap Filler, Chevy, Big/Small Block, Each

Part Number: CSI-914BLK

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025

• Free Shipping

Water Neck, Billet Aluminum, Black Anodized, 0 Degree, Each

Part Number: MOR-63426

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 8/25/2025