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AN & NPT Fittings & Adapters, Fuel Line Fittings, Hose Couplers & more

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AN & NPT Fittings & Adapters, Fuel Line Fittings, Hose Couplers & more

No matter what you’re plumbing—brakes, fuel, vacuum, oil, nitrous—you can plumb it with help from Summit Racing Equipment! You can find all of the...

No matter what you’re plumbing—brakes, fuel, vacuum, oil, nitrous—you can plumb it with help from Summit Racing Equipment! You can find all of the automotive fittings you need right here, including a wide range of AN, NPT, fuel line and hose fittings, along with adapters and reducers to go from one to another, and so much more. Our huge selection means you can assemble the complex custom plumbing system your competition vehicle needs, restore your classic car with period-accurate components, or just keep your daily driver running right. Take a look at our options for AN Hoses, to go along with your fittings.

No matter what you’re plumbing—brakes, fuel, vacuum, oil, nitrous—you can plumb it with help from Summit Racing Equipment! You can find all of the automotive fittings you need right here, including a wide range of AN, NPT, fuel line and hose fittings, along with adapters and reducers to go from one to another, and so much more. Our huge selection means you can assemble the complex custom plumbing system your competition vehicle needs, restore your classic car with period-accurate components, or just keep your daily driver running right. Take a look at our options for AN Hoses, to go along with your fittings.

Top Brands


Starting now, you can shop from all the best brands of automotive fittings on the market, including Russell, Earl’s, Aeroquip, and Fragola, plus our dependable and budget-friendly Summit Racing brand.

Individual Parts

Results 1 - 25 of 74

1/8 FPT X 16MM X1.5 LS TEMP PROBE ADAPTER

Part Number: FRA-493020-BL

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Gauge Adapters, Pressure and Temperature, Temperature Sender, Tach Resistor, Brass, Natural, GM, LS, Kit

Part Number: ATM-5284

4.74 out of 5 stars ( 23 )

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Fittings and Adapters, Transmission Line Adapters, Straight, Aluminum, Natural, -6 AN Male AN, 9/16 in.-18 O-ring Male Straight Cut O-ring, Pair

Part Number: ICB-551191-LS01

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WATER PUMP LS1

Part Number: MEZ-WPLS11720S

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Fitting, Adapter, AN to UNF, Straight, Aluminum, Black Anodized, -20 AN, 2 1/4 in. UNF, Each

Part Number: MEZ-WPP0243

5.0 out of 5 stars ( 2 )

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Fitting, Adapter, NPT to Metric, Straight, Aluminum, Black Anodized, M12 x 1.5, 1/8 in., Each

Part Number: FRA-493022-BL

3.0 out of 5 stars ( 2 )

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Temperature Sender Fittings, Straight, Brass, Natural, Gaskets, Kit

Part Number: NVU-99009-04

2.5 out of 5 stars ( 2 )

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Gauge Sending Adapter Fititngs, 1/8 NPT to M12 x 1.5, 1/8 NPT to M16 x 1.5 fitting, Tachometer Resistor, Kit

Part Number: IZL-8014LS

2.0 out of 5 stars ( 7 )

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Fitting, Adapter, AN to Metric Threads, Straight, Aluminum, Black Anodized, -4 AN, M16 x 1.5, Each

Part Number: EAR-AT9919BFJERL

5.0 out of 5 stars ( 3 )

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This product may not be eligible for select promotional offers

Fitting, Adapter, AN to UNF, Straight, Aluminum, Black Anodized, -16 AN, 2 1/4 in. UNF, Each

Part Number: MEZ-WPLS11716S

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Fuel Fitting, Quick-Connect, Chevy LS, LT, Ford Coyote, Aluminum, Black Anodized, Straight, 3/8 in., -6 AN, Each

Part Number: TNK-640853

5.0 out of 5 stars ( 13 )

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Coolant Temperature Sensor Adapter, Adapts 1/8 in. NPT Sensors to GM LS and LT Gen III/IV/V 28mm Engine Block Coolant Ports, Billet Aluminum, Each

Part Number: ICB-551782-125

5.0 out of 5 stars ( 1 )

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Gauge Adapters, Straight Fitting, Aluminum, Natural, 16mm x 1.5 Female Threads, Designed for Use with ICT LS Gen 4 Valley Pan Covers Only, Each

Part Number: ICB-551623

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Coolant Temperature Sensor Adapter, Adapts Chevy Small Block and Big Block 1/4 in. NPT Sensors to GM LS Engines, Billet Aluminum, Each

Part Number: ICB-551734

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Coolant Temperature Sensor Adapter, Adapts M12 x 1.5 Sensors to GM LS and LT Gen III/IV/V 28mm Engine Block Coolant Ports, Billet Aluminum, Each

Part Number: ICB-551782-M1215

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Oil Pressure Sensor Adapter, Adapts Factory BMW M12 x 1.5 Sensors to GM LS Engines, Billet Aluminum, Each

Part Number: ICB-551712-M1215

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Oil Pressure Sensor Adapter, Adapts Factory Porsche M14 x 1.5 Sensors to GM LS Engines, Billet Aluminum, Each

Part Number: ICB-551712-M1415

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Gauge Adapters, Straight Fitting, Billet Aluminum, Natural, 16mm x 1.5 Female Threads, Oil Pressure Sensor Relocation, GM, LS Series V8 Engines, Each

Part Number: ICB-551534

4.8 out of 5 stars ( 10 )

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Coolant Temperature Sensor Adapter, Adapts 3/8 in. NPT Sensors to GM LS and LT Gen III/IV/V 28mm Engine Block Coolant Ports, Billet Aluminum, Each

Part Number: ICB-551782-375

5.0 out of 5 stars ( 1 )

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Fitting and Adapters, Holley, Replacement, Plugs and Fittings, NPT to BSPT, Straight, Aluminum, Chrome, 3/4 in. NPT, for LT/LS Cooling Manifold, Kit

Part Number: HLY-97-177

4.5 out of 5 stars ( 2 )

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This product may not be eligible for select promotional offers

Gauge Adapter, Straight, Long, Aluminum, Natural, M12 x 1.5 Male Threads, 3/8 in. NPT Female Threads, LS, Each

Part Number: SUM-220697

5.0 out of 5 stars ( 3 )

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OIL PRESSURE FITTING ADAPTER, LS LT M16 X 1.5 TO 1/8 NPT

Part Number: MOR-49515

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Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Oil Sensor Adapter, LS Gen IV OEM Oil Sensor Adapter

Part Number: PGP-PRP-4523

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Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Gauge Adapter, Straight, Aluminum, Natural, M12 x 1.5 Male Threads, 3/8 in. NPT Female Threads, LS, Each

Part Number: SUM-220698

4.75 out of 5 stars ( 4 )

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