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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.

Showing In Stock Items. Show All 46 Items.

Individual Parts
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Results 1 - 25 of 39

30/40 amps American Autowire Anti-Theft Relay Kit 500239

30/40 amps American Autowire Anti-Theft Relay Kit 500239

30/40 amps American Autowire Anti-Theft Relay Kit 500239

Relay, Anti-Theft, 30/40 Amp, 12 Volts, Double Pole, Blade, 5 Terminal, Kit

Part Number: AWW-500239

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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40 amps Pico Relay and Connector Kit 5593PT

40 amps Pico Relay and Connector Kit 5593PT

40 amps Pico Relay and Connector Kit 5593PT

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

Part Number: PCO-5593PT

4.55 out of 5 stars ( 29 )

Estimated Ship Date: Today

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70 amps American Autowire Universal Relay Kit 500511

70 amps American Autowire Universal Relay Kit 500511

70 amps American Autowire Universal Relay Kit 500511

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 )

Estimated Ship Date: Today

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40 amps American Autowire Universal Relay Kit 500479

40 amps American Autowire Universal Relay Kit 500479

40 amps American Autowire Universal Relay Kit 500479

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

Part Number: AWW-500479

4.81 out of 5 stars ( 21 )

Estimated Ship Date: Today

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50 amps Painless Performance Relay and Relay Kit 30107

Made in the USA 50 amps Painless Performance Relay and Relay Kit 30107

50 amps Painless Performance Relay and Relay Kit 30107

Relay, 3-Bank, 50 Amp, Single Pole, Each

Part Number: PRF-30107

4.5 out of 5 stars ( 12 )

Estimated Ship Date: Today

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30 amps Ron Francis Wiring Fuel Pump Relay Kit FP35

30 amps Ron Francis Wiring Fuel Pump Relay Kit FP35

30 amps Ron Francis Wiring Fuel Pump Relay Kit FP35

Fuel Pump Relay, 30 Amps, Single Pole Double Throw, 5 Spade Terminals, Fuse, Wiring, 12 V, Each

Part Number: RFW-FP35

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Today

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30 amps MSD Relay and Wiring Kit 89618

30 amps MSD Relay and Wiring Kit 89618

30 amps MSD Relay and Wiring Kit 89618

Relay, Fuel Pump, 30 Amp, 12 V, Single Pole, Spade Terminal, 5 Male, Each

Part Number: MSD-89618

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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40 amps Ron Francis Wiring Universal Relay Kit RL404

40 amps Ron Francis Wiring Universal Relay Kit RL404

40 amps Ron Francis Wiring Universal Relay Kit RL404

Relay, 40 Amp, 12 V, 5 Male Terminals, Quad Relays, Single Pole Double Throw, Universal, Kit

Part Number: RFW-RL404

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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40 amps Ron Francis Wiring Universal Relay Kit RL402

40 amps Ron Francis Wiring Universal Relay Kit RL402

40 amps Ron Francis Wiring Universal Relay Kit RL402

Relay, 40 Amp, 12 V, 5 Male Terminals, Double Relay, Single Pole Double Throw, Universal, Kit

Part Number: RFW-RL402

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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250 amps Moroso Alternator Shutdown Relay Kit 74107

250 amps Moroso Alternator Shutdown Relay Kit 74107

250 amps Moroso Alternator Shutdown Relay Kit 74107

Relay, Alternator Shutdown, 12 V, 250 amps, Single Pole, Male Thread Terminal, Each

Part Number: MOR-74107

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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70 amps American Autowire Universal Relay Kit 510002

70 amps American Autowire Universal Relay Kit 510002

70 amps American Autowire Universal Relay Kit 510002

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 )

Estimated Ship Date: Today

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35 amps Painless Performance Relay and Relay Kit 80129

35 amps Painless Performance Relay and Relay Kit 80129

35 amps Painless Performance Relay and Relay Kit 80129

Relay, Universal, 35 Amp, Single Pole, Waterproof, Sealed Base, Each

Part Number: PRF-80129

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Today

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30 amps Painless Performance Relay and Relay Kit 80132

Made in the USA 30 amps Painless Performance Relay and Relay Kit 80132

30 amps Painless Performance Relay and Relay Kit 80132

Relay, 12 Volts, 30 Amp, Single Pole, Double Throw, 5 Terminal, Diode Suppressed, Universal, Each

Part Number: PRF-80132

3.4 out of 5 stars ( 5 )

Estimated Ship Date: Today

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30 amps Edelbrock Pro-Flo 4 Fuel Pump Relay Kit 3534

Made in the USA 30 amps Edelbrock Pro-Flo 4 Fuel Pump Relay Kit 3534

30 amps Edelbrock Pro-Flo 4 Fuel Pump Relay Kit 3534

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 )

Estimated Ship Date: Today

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60 amps American Autowire Universal Relay Kit 510602

60 amps American Autowire Universal Relay Kit 510602

60 amps American Autowire Universal Relay Kit 510602

Relay, 12 V, 60 amps, Double Pole, Wiring Harness, Kit

Part Number: AWW-510602

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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40 amps Ron Francis Wiring Universal Relay Kit RL40

40 amps Ron Francis Wiring Universal Relay Kit RL40

40 amps Ron Francis Wiring Universal Relay Kit RL40

Relay, 40 Amp, 12 V, 5 Male Terminals, Single Pole Double Thow, Universal, Each

Part Number: RFW-RL40

Not Yet Reviewed

Estimated Ship Date: Today

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20 amps Painless Performance Weatherproof Electric Water Pump Relay Kit 30132

Made in the USA 20 amps Painless Performance Weatherproof Electric Water Pump Relay Kit 30132

20 amps Painless Performance Weatherproof Electric Water Pump Relay Kit 30132

Relay, Water Pump, 20 Amp, Single Pole, Waterproof, Each

Part Number: PRF-30132

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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40 amps Ron Francis Wiring Anti-Theft Relay Kit AT70

40 amps Ron Francis Wiring Anti-Theft Relay Kit AT70

40 amps Ron Francis Wiring Anti-Theft Relay Kit AT70

Relay, Anti-Theft, 12 V, 40 amps, Single Pole, Blade Terminal, Wiring Harness, Kit

Part Number: RFW-AT70

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

30 amps Painless Performance Weatherproof Electric Fan Relay Kit 30130

Made in the USA 30 amps Painless Performance Weatherproof Electric Fan Relay Kit 30130

30 amps Painless Performance Weatherproof Electric Fan Relay Kit 30130

Relay, Fan, 30 Amp, Single Pole, Waterproof, Each

Part Number: PRF-30130

4.82 out of 5 stars ( 17 )

Estimated Ship Date: Today

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40 amps Caspers Electronics HD Relay Kit 108123

Made in the USA 40 amps Caspers Electronics HD Relay Kit 108123

40 amps Caspers Electronics HD Relay Kit 108123

Relay, 40 Amp, Single Pole, Kit

Part Number: CEI-108123

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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25 amps Painless Performance Relay and Relay Kit 80135

25 amps Painless Performance Relay and Relay Kit 80135

25 amps Painless Performance Relay and Relay Kit 80135

Relay, Micro, 15/25 Amp, Single Pole, Double Throw, 5 Terminals, Universal Fitment, Pair

Part Number: PRF-80135

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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50 amps Painless Performance Relay and Relay Kit 30108

Made in the USA 50 amps Painless Performance Relay and Relay Kit 30108

50 amps Painless Performance Relay and Relay Kit 30108

Relay, 6-Bank, 50 Amp, Single Pole, Each

Part Number: PRF-30108

4.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

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70 amps Painless Performance Relay and Relay Kit 80138

70 amps Painless Performance Relay and Relay Kit 80138

70 amps Painless Performance Relay and Relay Kit 80138

Relay, Universal, 70 Amp, Single Pole, SPST Heavy Duty, Relay Base, Each

Part Number: PRF-80138

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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35 amps Painless Performance Relay and Relay Kit 80128

35 amps Painless Performance Relay and Relay Kit 80128

35 amps Painless Performance Relay and Relay Kit 80128

Relay, Universal, 35 Amp, Single Pole, Waterproof, Each

Part Number: PRF-80128

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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