Automotive Cooling & Heating Parts

When you make engine modifications for more power, power-robbing heat increases—keeping cool is the key to maximum performance! Summit Racing has everything you need...

When you make engine modifications for more power, power-robbing heat increases—keeping cool is the key to maximum performance! Summit Racing has everything you need to offset that extra heat, including high performance radiators and oil coolers, electric fans, high-flow electric water pumps, and thermostats. We also have radiators and coolers for everything from stock replacements to street rods and other custom applications, plus flex fans, wiring kits, and radiator caps. If your heater or air conditioner has seen better days (or if your vehicle never had one!), we can help you out with heater cores, air conditioners,...

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Sierra Marine Thermostat Housings 18-1989

Marine Water Necks, Thermostat Housing, 90-degree, Multi-port, Stainless Steel, Polished, with Spacers, Gasket, Pipe Plugs, Mallory, Mercruiser, Kit

Part Number: RRA-18-1989

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

Sierra Marine Thermostats 18-3555

Thermostats, Mechanical, 160 Degrees F Opening Temperature, GLM/Mallory/Mercruiser Replacement, Each

Part Number: RRA-18-3555

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

Sierra Marine Distributor Cap Fasteners 18-26800

Marine Drive Unit Components, Marine Cap Clip, Kit

Part Number: RRA-18-26800

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Sierra Marine Water Pump Impeller Keys 18-3270

Impeller Key, Marine, Each

Part Number: RRA-18-3270

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impeller Keys 18-3326

Impeller Key, Marine, Each

Part Number: RRA-18-3326

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impeller Keys 18-3269

Impeller Key, Marine, Each

Part Number: RRA-18-3269

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

Sierra Marine Water Pump Impeller Keys 18-3302

Impeller Key, Marine, Each

Part Number: RRA-18-3302

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impeller Keys 18-3268

Impeller Key, Marine, Each

Part Number: RRA-18-3268

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impeller Keys 18-3271

Impeller Key, Marine, Each

Part Number: RRA-18-3271

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impeller Keys 18-3274

Impeller Key, Marine, Each

Part Number: RRA-18-3274

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impeller Keys 18-3292

Impeller Key, Marine, Each

Part Number: RRA-18-3292

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Replacement Components 18-3357

Marine Water Pump Components, Wear Plate, Each

Part Number: RRA-18-3357

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impellers 18-8910

Impeller, Marine, Each

Part Number: RRA-18-8910

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impellers 18-8923

Impeller, Marine, Each

Part Number: RRA-18-8923

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impellers 18-8903

Impeller, Marine, Each

Part Number: RRA-18-8903

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

Sierra Marine Water Pump Impellers 18-3368

Impeller, Marine, Each

Part Number: RRA-18-3368

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impellers 18-8920

Impeller, Marine, Each

Part Number: RRA-18-8920

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impellers 18-8900

Impeller, Marine, Each

Part Number: RRA-18-8900

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Sierra Marine Water Pump Impeller Kits 18-45713

Impeller Kit, Marine, Fits F4B Pumps, Each

Part Number: RRA-18-45713

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

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