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Automotive Relays

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Automotive Relays

Generally speaking, a relay is an electronically operated switch that allows you to control a circuit with a low-power signal. Almost every system on your vehicle incorporates...

Generally speaking, a relay is an electronically operated switch that allows you to control a circuit with a low-power signal. Almost every system on your vehicle incorporates a relay in its controls, including the starter, electric cooling fans, fuel pump, headlights, and air conditioner, plus accessories like nitrous, off-road lights, and winches.

Whether you’re assembling an all-new wiring harness, or making repairs to existing circuits, the extensive selection, powerful search tools, and tech expertise at Summit Racing Equipment will help you find the right size and amperage rating of relay for the job.

Top Brands

Generally speaking, a relay is an electronically operated switch that allows you to control a circuit with a low-power signal. Almost every system on your vehicle incorporates a relay in its controls, including the starter, electric cooling fans, fuel pump, headlights, and air conditioner, plus accessories like nitrous, off-road lights, and winches.

Whether you’re assembling an all-new wiring harness, or making repairs to existing circuits, the extensive selection, powerful search tools, and tech expertise at Summit Racing Equipment will help you find the right size and amperage rating of relay for the job.

Top Brands


Don’t take chances with a knock-off relay! Summit carries general purpose and application-specific relays from well-regarded brands like Painless Performance, MSD, Auto Rod Controls, Bosch, ACDelco, Standard Motor Products, Hella, and more.

Individual Parts

Results 1 - 25 of 111

Relays, Fuel Pump, 30 Amp, 12V, Single Pole, Blade Type, Wire Harness Included, Each

Part Number: HLY-12-753

4.5 out of 5 stars ( 10 )

Estimated Ship Date: Today

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This product may not be eligible for select promotional offers

Relay, Fuel Pump, 30 Amp, Single Pole, Each

Part Number: MRF-MP-1050

4.93 out of 5 stars ( 14 )

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Relay, Fuel Pump, 30 Amp, Single Pole, Each

Part Number: MRF-MP-1025

4.5 out of 5 stars ( 4 )

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Relay, Fan, 40 Amp, Single Pole, Each

Part Number: BCI-75017

4.8 out of 5 stars ( 10 )

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Relay, Headlight, 40 Amp, Single Pole, 9004/9007, Each

Part Number: PRF-30816

5.0 out of 5 stars ( 6 )

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Reverse Dome Light Relay, 12 V, 5-Blade, Kit

Part Number: RFW-RD3

Not Yet Reviewed

Estimated Ship Date: Feb 4, 2027 if ordered today

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Estimated Ship Date: Feb 4, 2027 if ordered today

Fan Harness with Relay, 40 amp, 12 V, Single Pole, Each

Part Number: SPU-IX-FRH

4.72 out of 5 stars ( 39 )

Estimated Ship Date: Today

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Relay and Connector Kit, 12 V, 40 amps, Single Pole, Spade Terminal Type, Wiring Harness, Kit

Part Number: PCO-5593PT

4.59 out of 5 stars ( 32 )

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Relay and Harness, 40 Amp, Single Pole, Kit

Part Number: PCO-5591PT

4.75 out of 5 stars ( 77 )

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Relay, 12 V, 40 amps, Single Pole, Wire Leads Terminal Type, Wiring Harness, Fuse, Kit

Part Number: AWW-500479

4.83 out of 5 stars ( 23 )

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Relay, 12 V, 70 amps, Single Pole, Wire Leads Terminal Type, Wiring Harness, Kit

Part Number: AWW-500511

4.86 out of 5 stars ( 7 )

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Relay, Ignition Power, Auto, 30 Amps, 12/16 V, 3 Amp 400 V Diode, with Harness, Male/Female Blade Connectors/Terminals, Screws, and Socket, Kit

Part Number: PNX-2001

4.68 out of 5 stars ( 28 )

Estimated Ship Date: Today

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Relay, Pro-Flo 4, Fuel Pump, EFI, Fuel Injection, 30 Amp, Harness Included, Inline Fuse, Kit

Part Number: EDL-3534

3.67 out of 5 stars ( 3 )

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This product may not be eligible for select promotional offers

Relay, Water Pump, 30 Amp, Single Pole, Wiring Harness Crimp Connectors, Each

Part Number: MEZ-WIK346

4.8 out of 5 stars ( 15 )

Estimated Ship Date: Today

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Relays, 30 Amp, 12 V, Single Pole, 5 Blade Terminals, Wiring Harness, General Use, Each

Part Number: AAF-ALL76188

3.4 out of 5 stars ( 5 )

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Fan Relay Kit, 70 Amps, 12V, Temperature Sender, Single Relay, Fuse, Wire Harness, Kit

Part Number: AWW-510002

5.0 out of 5 stars ( 3 )

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Fan Relay Kit, 80 Amps, 12V, Temp Sender, Two 40 Amp Relays, On at 210 degrees, Off 195 degrees, Harness, Kit

Part Number: AWW-510001

4.7 out of 5 stars ( 10 )

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Fan Relay, Fan-Thom II, 12 V, 35 amps, Single Pole, Wiring Harness, Kit

Part Number: PRF-30133

5.0 out of 5 stars ( 2 )

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Direct Fit Auto Fuse Series-Relay and Connector Kit , Needed with 1967-1978 Chevy Truck Direct Fit Auto Fuse Dash harness Purchase , Chevrolet

Part Number: SUM-RP20466

Not Yet Reviewed

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Relays, Dual Fuel Pump, 40 Amp, 12V, Single Pole, Blade Type, Wire Harness Included, Chrysler, Dodge, Ford, Kit

Part Number: HLY-12-759

Not Yet Reviewed

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This product may not be eligible for select promotional offers

Relay, Heavy-Duty, 40 Amp, Double Pole, Double Throw, Anti-Flyback, Harness Included, Each

Part Number: NEX-15515

Not Yet Reviewed

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Relays, 40 Amps, 12 Volts, Screw Type Terminals, 4 Terminals, Harness Not Included, Each

Part Number: FCH-3020100067

Not Yet Reviewed

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Relay, 12 V, 35 amps, Single Pole Double Throw, Wiring Harness, Waterproof Design, Kit

Part Number: AWW-500093

Not Yet Reviewed

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Glow Plug Harness Relay

Part Number: RNB-904-100

Not Yet Reviewed

Estimated Ship Date: Nov 30, 2026 if ordered today

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Estimated Ship Date: Nov 30, 2026 if ordered today