Availability
Showing In Stock Items. Show All 45 Items.
Holley has fittings to adapt different sized fuel lines to bare Holley fuel bowls, as well as hose and banjo fittings for special applications.
( 105 )
$18.99
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$66.55
Holley manifold plug and fitting kits allow two different styles of connections within one unit. They are offered to service your mid-mount accessory drive LT/LS, BBC, and SBC cooling manifolds. These genuine Holley fittings are constructed from aluminum and feature a chrome finish for longevity.
( 2 )
$18.18
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$43.69
These Holley fuel bowl fittings are an exact fit to ensure a perfect seal. An O-ring is included, so you won't have a fuel leak again.
( 38 )
$16.78
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$38.13
On Sale
Holley offers air conditioner compressor manifolds in a variety of styles and finishes. These replacement line adapters are machined from aluminum or copper and will facilitate your A/C compressor hookup. Mounting hardware is included. Applications include vehicles with a GM LS engine.
( 8 )
$42.44
$23.34
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$38.67
Holley fuel rail adapter fittings are designed to connect Holley fuel rails to a GM factory fuel line. They're machined from aluminum (black anodized) or steel (yellow dichromate), and are available in different sizes, angles, and attachment options.
( 3 )
$39.50
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$52.25
Holley AN to straight cut O-ring fittings are great fuel pump accessories. They are hard anodized aluminum for wear and corrosion resistance--so your Holley fittings last longer!
( 4 )
$22.39
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$32.66
Monitor your fuel pressure while you're driving with the use of Holley fuel pressure gauge fittings. They are dash mounted and eliminate the guesswork that fuel pressure can cause. They plumb near the carburetor fuel inlet and include the sending unit.
( 8 )
$8.36
Holley EGT bungs are quality replacement service parts designed exclusively for use with Holley's 8-Channel Exhaust Gas Temperature Monitoring kit (sold separately). Made from 316 stainless steel, these weldment bung fittings feature a built-in step—which keeps the bung held in place during the welding process, ensuring a perfect weld. They're sold individually or in multiple-piece count sets.
Not Yet Reviewed
$27.90
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$184.95
Holley 180-degree timed spark fittings install on the metering block of your Holley carburetor and allow you to provide vacuum for the operation of the distributor advance. They are manufactured from durable brass and easily thread into the secondary metering block or plate of your Holley carburetor.
( 2 )
$22.43
Holley AN to metric adapter fittings are manufactured from high-quality materials for durability and feature a stunning finish. Available in multiple sizes and configurations.
( 1 )
$66.59
Holley MAP sensor port plugs are milled from billet aluminum for strength, powdercoated for corrosion resistance, and include an O-ring for a tight seal. They're designed to eliminate LS3-style MAP sensors and work with most intake manifolds.
( 5 )
$36.14
These Holley Pro-Jection service parts are available for today's most popular Pro-Jection kits. Whether you have an old analog or new digital system, we have the replacement parts for you. Map sensors, fuel injectors, oxygen sensors, extension cables, a variety of fittings and adapters, and many other parts are available to keep your Pro-Jection system operating efficiently.
( 2 )
$10.99
If using a Holley swap oil pan with your LT accessory drive a check valve adapter is required. Holley's oil return check valve adapter kits provide the fittings and bracket needed for proper installation and functionality.
Not Yet Reviewed
$61.05
Holley reducers have been specifically designed to adapt two different size fittings. They are manufactured from durable brass and feature a natural finish. Available in different sizes, Holley fitting reducers make an excellent choice for connecting your fuel or other plumbing lines together.
( 9 )
$22.40
Ever needed to install an oxygen sensor and couldn't figure out how to do it. Install it the easy way with these Holley weld-in oxygen sensor bungs. They're designed to be welded into any steel pipe and come with the proper threads for any OEM or aftermarket oxygen sensor.
( 7 )
$15.77
Holley fuel bowl plugs are designed to plug the open holes on your carburetor fuel bowls. They are manufactured from quality materials and come available in different thread sizes to match your specific carburetor.
( 5 )
$13.96
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$21.00
On Sale
Holley weld-on fill cap kits include a cap CNC-machined from 6061-T6 billet aluminum with a bright, black anodized finish for great looks and corrosion protection. They're available with aluminum or steel weld bungs to match your application. Holley weld-on fill cap kit features include: * Allows for installation of a fill cap or inspection plug anywhere needed * Caps feature a laser-etched "Holley Equipped" logo * Easy-to-grip screw-on cap with O-ring seal and a 1.38 in. diameter opening * 1.950 in. O.D. / 1.400 in. I.D. weld bung * 1.810 in. diameter at the step of weld bung * 0.675 in. weld bung overall height * 0.570 in. height at the step of weld bung * 1 1/2-12 in. thread
( 2 )
$56.19
$30.90
The Holley EFI vacuum manifold kit is designed for as a simple and clean solution for plumbing either vacuum or boost referenced sources. This manifold block features 12 1/8th NPT ports that can be plumbed with most common EFI transducers, such as the Holley 554-102 0-100 psi transducer. It also features two -6 O-ring boss AN ports, ensuring your manifold block has an excellent vacuum or boost reference source. Improve your engine bay organization by mounting all of your common pressure sources in one easy-to-access location! Product features: * Compatible with all transducers that utilize 1/8 NPT male threads and 7/8 in. or smaller body/hex diameter * 12 independent 1/8 NPT ports * Two -6 ORB ports * Improve engine bay organization by mounting transducers and/or vacuum lines all in one easy-to-reach location * Ideal for engines that require multiple vacuum/boost reference sources * 4 mounting holes designed for the use of 5/16 in. socket head cap hardware for secure and robust mounting * Crafted from 6061 aluminum * Anodized black for durability and laser-etched with the Holley EFI logo
Not Yet Reviewed
$73.19
On Sale
Earl's Performance offers a complete line of power steering adapter fittings to accommodate a variety of thread sizes to plumb your pump. Earl's offers the most complete line of adapter fittings in the industry.
( 23 )
$49.95
Allstar Performance aluminum carburetor fittings are accessories used to install and fine-tune your carb for optimum performance gains. These fittings simplify plumbing your fuel system and building custom fuel lines. They're available in a variety of finishes, sizes, and threads—primarily for Holley applications.
( 10 )
$6.99
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$16.99
On Sale
When you need fittings for a specific application--be it for a carburetor, power steering, fuel injection, or the like--look to Fragola Performance Systems for the finest fittings and adapters available. Fragola offers a variety of perfected fittings, like their carburetor inlet fittings. These fittings are made from aerospace-quality aluminum and they are anodized in a choice of colors to complement any engine compartment. These carburetor inlet fittings are available in many angles and sizes to match your application. Plumb with precision fittings from Fragola Performance Systems.
( 26 )
$15.99
$4.49
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$29.99
On Sale
For a step above, look at the Aeromotive line of custom fittings, adapters, and hose-ends, offering uncompromised fuel flow and positive sealing. They provide more area and smoother transitions from the inlet to the outlet, resulting in less restriction than any other fitting line. Featuring quality construction and CNC-machining for precision fit and unmatched flow, all Aeromotive carburetor inlet fittings provide full compatibility with gasoline and alcohol-based fuels.
( 5 )
$15.35
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$20.65
$13.82
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$18.58
Demon Carburetion offers these high-flow radiused fittings to connect your Demon carburetor to your fuel system. They are manufactured from durable materials and use a radiused design for increasing fuel flow while reducing friction.
( 10 )
$25.22
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$35.01
Summit Racing™ carburetor inlet fittings allow you to attach the fuel lines and other linkages needed to make your carburetor run properly. These carb fittings are manufactured from quality materials to help you get connected the right way and to prevent leakage.
( 86 )
$4.99
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$19.99
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