1981 CHEVROLET K20 Cooling & Heating - In Stock Filter Options - Vendor In Stock Filter Options

MotoRad Spec-R Racing Thermostats MRD100

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

Part Number: SNN-MRD100

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Hayden Fluid Coolers 514

Fluid Cooler, Transmission, Tube, Fin, Natural, 7.5 in. x 15.875 in. x 0.75 in., 9/16 in.-18 Inlet, Outlet

Part Number: HDA-514

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Four Seasons Ultra-Cool Transmission Oil Coolers 53022

Ultra-Cool Transmission Oil Cooler, Kit

Part Number: FSS-53022

4.9 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Hayden Fluid Coolers 401

Fluid Cooler, Transmission, Tube, Fin, Natural, 5 in. x 12.5 in. x 0.75 in., 3/8 in. Inlet, Outlet, Each

Part Number: HDA-401

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Agility Auto Parts Heater Cores 9010080

Heater Core, Stock Replacement, 5/8 in. Inlet, 3/4 in. Outlet, Aluminum, Chevy, GMC, Truck, SUV, Without A/C, Each

Part Number: RDR-9010080

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Brothers Trucks Defrost Vents 05-163

Interior Vents, Defrost Vents, Rectangular, Plastic, Black, Fits Left or Right Sides, Chevrolet, GMC, Each

Part Number: HCT-05-163

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Mr. Gasket Chrome Water Pump Bolts 4998

Bolts, Chrome, Water Pump, Small and Big Block, Chevy, Long Pump, Hex Head, Kit

Part Number: MRG-4998

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Mr. Gasket Chrome Water Pump Bolts 4996

Bolts, Chrome, Water Pump, Chevy, Small Block, Short Pump, Hex Head, Kit

Part Number: MRG-4996

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Four Seasons Blower Motors 35345

HVAC Blower Motor, Replacement, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: FSS-35345

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Hayden Fan Clutches 2707

Fan Clutch, Standard Thermal, Buick, Cadilliac, Chevy, Chrysler, Dodge, Oldsmobile, Plymouth, Pontiac, GMC, Each

Part Number: HDA-2707

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Four Seasons Air Conditioning Accumulators and Receiver Driers 33204

A/C Accumulator, Vertical, 3.50 x 9.00 in., 0.75 in. Female O-ring Inlet/Outlet, Aluminum, Natural, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: FSS-33204

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Four Seasons Fan Clutches 36949

Fan Clutch, Non-Thermal, AMC, Jeep, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: FSS-36949

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Perma-Cool Turbo Flex Heavy-Duty Fan Clutches 25100

Perma-Cool Turbo Flex Heavy-Duty Fan Clutches 25100

Fan Clutch, Turbo Flex, Heavy-Duty, Non-thermal, 7.25 in. Diameter, Each

Part Number: PRM-25100

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Hayden Fluid Coolers 512

Fluid Cooler, Transmission, Tube, Fin, Natural, 7.5 in. x 12.5 in. x 0.75 in., 9/16 in.-18 Inlet, Outlet

Part Number: HDA-512

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Hayden Fan Clutches 1705

Fan Clutch, Non-Thermal, AMC, Buick, Chevy, Oldsmobile, Pontiac, GMC, Each

Part Number: HDA-1705

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Hayden Fluid Cooler Mounting Kits 153

Fluid Cooler Mounting, Steel, Natural, Kit

Part Number: HDA-153

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Four Seasons Blower Motors 35588

HVAC Blower Motor, Replacement, Each

Part Number: FSS-35588

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Reach Cooling Heater Cores 18-11695

Heater Core, Aluminum, Natural, Chevy, GMC, Each

Part Number: RCG-18-11695

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

OER Authorized Radiator Overflow Tanks 358184

Overflow Tank, Replacement, Plastic, White, Bolt-in, Chevy, GMC, Each

Part Number: OER-358184

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Four Seasons Blower Motor Wheels 35601

Blower Motor Wheel, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Dodge, Ford, Volvo, Each

Part Number: FSS-35601

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Four Seasons Ultra-Cool Transmission Oil Coolers 53000

Transmission Oil Cooler, Ultra-Cool, Tube and Fin, 4 Rows, Aluminum, 0.375 in. Hose Barb Inlet/Outlet, Each

Part Number: FSS-53000

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Flex-A-Lite Billet Aluminum Radiator Caps 126844

Radiator Cap, Round, 16 psi Maximum Pressure, Billet Aluminum, Black, Flex-A-Lite Logo, Buick, Cadillac, Chevy, Chrysler, Ford, GMC, Volkswagen, Each

Part Number: FLX-126844

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

Summit Racing™ Direct-Fit Restoration Interior Trim Parts SUM-RP22492

Interior Vents, Dash, Defroster Grill, Rectangular, Plastic, Chrome Finish, Front Left or Right Side, Chevy, GMC, Truck, Each

Part Number: SUM-RP22492

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air

GMB Replacement Fan Clutches 920-2060

Fan Clutch, Replacement, Severe-duty Thermal Style, Clockwise Rotation, Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Olds, Pontiac, Each

Part Number: GMB-920-2060

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

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Estimated Ship Date: Mar 23, 2026 if ordered today

US Motor Works Thermal Fan Clutches 22049

Fan Clutches, Standard Thermal, AMC, Buick, Cadillac, Chevy, Dodge, GMC, Jeep, Oldsmobile, Pontiac, Each

Part Number: UMW-22049

Not Yet Reviewed

Estimated Ship Date: Monday 2/23/2026 if shipped by air

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Estimated Ship Date: Monday 2/23/2026 if shipped by air