1999 Thermostats, Housings & Fillers

Water Neck, Billet Aluminum, Straight -16 AN Male Thread, Ford, Small Block Windsor, Each

Part Number: MOR-63455

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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

Part Number: MRG-2671NA

3.29 out of 5 stars ( 7 )

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

Thermostat, 160 Degrees Opening Temp Rating, Copper/Stainless Steel, Gaskets, Cadillac, Chevy, GMC, Hummer, Pontiac, Each

Part Number: LPE-L310045297

4.0 out of 5 stars ( 23 )

Estimated Ship Date: Dec 8, 2025 if ordered today

Thermostat, Mechanical, OE, 198 degrees, Standard-flow, Cadillac, Chevy, GMC, Oldsmobile, Each

Part Number: ADO-131-151

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

• $20.00 Summit Bucks

Thermostat Spacer, Billet Aluminum, Black, 1 in. Thick, Chevy, Small Block, Big Block, Each

Part Number: MOR-63434

Not Yet Reviewed

Estimated Ship Date: Today

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

Part Number: MCH-BTH-211-05

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Part Number: SNN-MRD100

Not Yet Reviewed

Estimated Ship Date: Today

Water Neck, Aluminum, Polished, 90 Degree, Chevy, Big/Small Block, Each

Part Number: WND-6244

5.0 out of 5 stars ( 14 )

Estimated Ship Date: Today

Water Neck and Thermostat Housing, Swivel, Aluminum, Black, 45 Degree, GM, LS, Each

Part Number: DWR-32-1761-BLK

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Water Neck, Steel, Chrome Plated, O-Ring, Straight Up, Chevy, Big/Small Block, Each

Part Number: MRG-9845

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Today

Water Neck, Aluminum, Black Anodized, O-Ring, Straight, 1.500 in. Outlet, Chevy, LS1/LS2/LS6, Each

Part Number: HSE-4910-347-242

Not Yet Reviewed

Estimated Ship Date: Today

Water Neck, Aluminum, Chrome Plated, Straight Out, Chevrolet, LS, Each

Part Number: SUM-370990

3.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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

Part Number: SNN-MRD104

Not Yet Reviewed

Estimated Ship Date: Today

Water Neck, Billet Aluminum, Black Anodized, Straight Up, Chevy, Mopar, Big Block, Small Block, Each

Part Number: MEZ-WN0916S

Not Yet Reviewed

Estimated Ship Date: Today

Water Neck, Stock Style, Zinc Alloy, Chrome Plated, Ford, Each

Part Number: SDK-C5ZZ-8592-C

4.04 out of 5 stars ( 25 )

Estimated Ship Date: Today

Water Neck, Spec-R, Aluminum Natural, Chevy, Cadillac, GMC, Pontiac, Hummer, Each

Part Number: SNN-MRD102

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, 15 Degree, O-Ring, Steel, Chrome, Chevrolet, 4.3, V6, SBC, BBC, Each

Part Number: EDL-4809

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Water Neck, Billet Aluminum, Black Anodized, Straight Up, Chevy, Mopar, Big Block, Small Block, Each

Part Number: MEZ-WN0912S

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Water Necks and Thermostat Housings, Aluminum, Polished, 1.50 in. Outlet, 45 Degree, Each

Part Number: MLL-BPP893745

Not Yet Reviewed

Estimated Ship Date: Today

Thermostat, 180 Degrees, Each

Part Number: GRN-53080S

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Part Number: TRD-4788

3.2 out of 5 stars ( 5 )

Estimated Ship Date: Today

Water Neck, 90 degree, Swivel, Cast Aluminum, Polished, O-ring Sealing Style, Chevy, Small Block, Big Block

Part Number: KYS-100-15359-1

4.67 out of 5 stars ( 12 )

Estimated Ship Date: Today

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

Part Number: MEZ-WN0028R

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Today