Best Air Intake For Harley Davidson: Compare Fitment and Features

#1 · Best Overall

1. ALLOYFORGE Heavy Breather Air Cleaner

• Dimensions: 12"L x 6.5"W x 8"H
• Dimensions: 12"L x 6.5"W x 8"H

Best for: Later-model Heavy Breather shoppers.

Why it ranks #1: Lists fitment for 2018–2024 Softail and 2017-later Touring, claims 42% greater airflow, and includes an air filter and mounting hardware.

The claimed 42% greater airflow versus traditional Heavy Breather filters is this ALLOYFORGE cleaner’s key performance distinction, giving riders a concrete airflow comparison to consider. Its stated coverage includes 2018–2024 Softail and later Touring and Freewheeler models, subject to substantial model and accessory exclusions.

The listed fitment covers 2018–2024 Softail, 2017-later Touring, and 2017-later Freewheeler, which helps owners of those later-model families identify its intended use. The exclusions matter: models with fairing-lower glove boxes, speakers, or Road Glide fairing spoilers are ruled out, along with several named newer configurations. The package includes an air filter and mounting hardware, supplying the listed mounting pieces. Its 12-by-6.5-by-8-inch dimensions can help with storage and installation-area planning.

Skip it if you ride a model with fairing-lower glove boxes, speakers, or a Road Glide fairing spoiler; those are listed exclusions.

Consider this for an eligible later-model Softail, Touring, or Freewheeler owner focused on the stated airflow increase and included mounting hardware. Its exclusions are significant, so accessory configuration and model year determine whether it suits your motorcycle.

Listed on Amazon as: Heavy Breather Extreme Air Cleaner Intake Filter for Harley Touring, Softail, Street Electra Road King Glide, 2018-2022 (Black)

#2 · Broad Model Coverage

2. TOPRAMETAL Nake Air Cleaner

• Dimensions: 7.8"L x 7.8"W x 3.5"H
• Dimensions: 7.8"L x 7.8"W x 3.5"H

Best for: Broad-range Harley air-cleaner shoppers.

Why it ranks #2: States fitment across Sportster, Dyna, Softail, Touring, and Trike ranges, with complete gasket and bolt kits and a one-year quality guarantee.

Its stated fitment spans Sportster models from 2004–2024 and several Dyna, Softail, and Touring year ranges, giving this TOPRAMETAL kit a broad, application-led appeal. Complete gasket and bolt kits are included, which can simplify gathering the listed fastening pieces for an installation on a covered motorcycle.

The listing separates applications into fitment types, including Sportster 2004–2024 and ranges for Dyna, Softail, and Touring, while also naming exclusions within some groups. That detail helps buyers narrow the candidate application before ordering, although the fitment text is split across types and should be read closely. A complete gasket and bolt kit is included, so the package supplies those installation pieces. Its stated 7.8-inch-square dimensions also help with space planning around the air-cleaner area.

Skip it if you prefer a clearly simplified fitment list; the K&N 57-1137 instead itemizes its intake components.

This is for Harley owners whose motorcycle falls within one of the listed Sportster, Dyna, Softail, or Touring ranges and who want gaskets and bolts supplied. Check the type and exclusions carefully; the broad range is not universal fitment.

Listed on Amazon as: For harley air cleaner filter sportster street road glide king for harley davidson motorcycle air intake (Nake style -Black, B-For Softail/Dyna 93-15 ,Touring 01-07)

#3 · Washable Filter

3. TOPRAMETAL OPS Air Cleaner

• Dimensions: 7"L x 7"W x 3"H
• Weight: 4 lb
• Dimensions: 7"L x 7"W x 3"H

Best for: Washable-filter Harley owners.

Why it ranks #3: Lists cotton-yarn filter material as washable and reusable, requiring oiling, and gives fitment ranges for Sportster, Dyna, Softail, and Touring models.

A cotton-yarn filter that is washable and reusable gives this TOPRAMETAL cleaner a maintenance-oriented advantage for riders willing to clean and re-oil an element. The listing names Sportster, Dyna, Softail, and Touring application ranges, and includes gasket and bolt kits for the stated installation applications.

The cotton-yarn element can be washed and reused, but the listing explicitly says it requires oiling, so owners should account for that added maintenance step. Fitment is divided into application types, with year ranges and exclusions covering selected Sportster, Dyna, Softail, and Touring motorcycles. The complete gasket and bolt kits help provide listed installation hardware in the package. At 7 by 7 by 3 inches, the stated dimensions offer a compact reference for storage and space planning.

Skip it if you want a filter that does not require an oiling step; the K&N RK-3952 listing specifies low-pressure-water cleaning.

This fits riders who want a reusable cotton-yarn filter and whose Harley falls within a listed application range. Be prepared to oil the filter after washing, and review the type-specific exclusions before treating the stated family coverage as a match.

Listed on Amazon as: For harley air cleaner filter Sportster Softail Touring street road king glide Dyna for harley davidson air intake filters (OPS Black – Gray Filter, C-For Touring 08-16, Softail 16-17)

#4

4. K&N 57-1137 Intake Kit

• Dimensions: 11.75"L x 9.5"W x 4.88"H
• Weight: 4.2 lb
• Dimensions: 11.75"L x 9.5"W x 4.88"H

Best for: Complete intake-kit shoppers.

Why it ranks #4: Includes an air filter, intake tube, gaskets, back plate, and parts kit; Harley model fitment is not specified in the supplied details.

The 57-1137’s listed intake tube, back plate, two gaskets, and parts kit make it the most component-specific choice here, helping buyers plan around a fuller kit rather than a filter alone. K&N also claims increased horsepower, better throttle response, and a more pronounced engine sound.

The included air filter, intake tube, back plate, two gaskets, parts kit, and literature packet give the package a clearly itemized set of installation components. Its stated 11.75-by-9.5-by-4.88-inch dimensions help with storage and handling planning, while the washable filter can go up to 100,000 miles before cleaning under normal highway driving. K&N claims performance gains and improved response, but the supplied listing does not identify Harley fitments by model or year.

Skip it if you need an explicitly listed Harley application; the supplied details do not name model years or fitments.

Choose this if you want an itemized intake kit with tube, back plate, and gaskets alongside K&N’s reusable filter. It is a sensible package to investigate for an upgrade, but the supplied information does not establish compatibility with a particular Harley.

Listed on Amazon as: K&N Cold Air Intake Kit: High Performance, Increase Horsepower, 57-1137

#5

5. K&N 57-1134 Intake Kit

• Weight: 4.2 lb

Best for: Multi-piece reusable intake kits.

Why it ranks #5: The kit includes an air filter, back plate, gaskets, and parts kit, but the supplied listing does not state Harley-specific compatibility.

Two gaskets are specifically listed with the 57-1134’s intake tube, back plate, filter, and parts kit, giving buyers a more detailed package inventory for installation planning. Its washable high-flow filter and K&N’s stated horsepower and throttle-response gains make it a performance-oriented kit to assess.

The named contents—air filter, intake tube, two gaskets, back plate, parts kit, and literature packet—help buyers see what installation pieces are supplied. The filter is reusable and can go up to 100,000 miles before cleaning under normal highway driving, with low-pressure-water cleaning specified for refreshes. K&N also claims improved throttle response and engine sound. However, the provided specifications do not state Harley model or year fitment, leaving application verification as an essential purchase consideration.

Skip it if you require model-specific Harley fitment in the supplied specifications; this listing does not identify a model-year application.

The 57-1134 suits buyers who value an itemized kit with two gaskets and a reusable filter, plus K&N’s stated response benefits. Its listed contents aid planning, but they do not establish compatibility with any particular Harley model.

Listed on Amazon as: K&N Cold Air Intake Kit: High Performance, Increase Horsepower, 57-1134

#6

6. K&N 57-1139 Intake Kit

• Weight: 4.2 lb

Best for: Reusable filter kit buyers.

Why it ranks #6: Includes an air filter, intake tube, gasket, back plate, and parts kit; verify Harley fitment because the provided details do not identify compatible models.

The 57-1139 combines a washable high-flow filter with a listed intake tube, back plate, gasket, and parts kit, helping buyers identify key kit contents at a glance. K&N claims increased horsepower, improved throttle response, and enhanced engine sound for riders considering a performance-focused intake.

The package names an air filter, intake tube, gasket, back plate, parts kit, and literature packet, giving buyers a component list for installation planning. Its reusable filter can go up to 100,000 miles before cleaning under normal highway driving, and K&N says it can be refreshed with low-pressure water. Those features can reduce repeat filter replacement and clarify maintenance workflow. The supplied information does not specify Harley model-year applications, so it cannot establish fit for a particular motorcycle.

Skip it if you need a verified Harley model-year match from the listing; the K&N 57-1139 details provide no application chart.

This may suit a rider seeking a component-listed K&N intake kit with a reusable filter and stated performance aims. Its supplied specifications do not identify a Harley application, so use the fitment information for your exact motorcycle as the deciding boundary.

Listed on Amazon as: K&N Cold Air Intake Kit: High Performance, Increase Horsepower, 57-1139

#7

7. K&N RK-3933B Air Intake

Best for: Multi-piece powersports filter kits.

Why it ranks #7: Includes an air filter, back plates, cover, and parts kit, but no Harley model or year compatibility is stated in the supplied data.

The RK-3933B lists a back plate, cover, parts kit, and air filter, making its included hardware more explicit than a filter-only package. K&N claims increased horsepower and improved throttle response, while the washable, reusable filter offers a maintenance path based on cleaning rather than replacement.

Its listed contents—air filter, two back plates, cover, parts kit, and literature pack—give buyers a useful inventory for planning an installation and organizing the supplied pieces. The high-flow filter is washable and reusable, with cleaning described using low-pressure water; under normal highway driving, K&N says it can go up to 100,000 miles before cleaning. Claimed horsepower and throttle-response gains add a performance rationale. The provided facts do not specify Harley model-year compatibility.

Skip it if you need model-specific Harley fitment stated before ordering; the supplied details do not identify applications.

Choose this to investigate if you value an itemized K&N kit with two back plates, a cover, and a reusable filter. Its stated benefits and contents are clear, but Harley model-year compatibility is not established in the supplied information.

Listed on Amazon as: K&N Cold Air Intake System: Powersports High-Flow Air Filter, RK-3933B

#8

8. K&N RK-3952 Air Intake

• Dimensions: 12"L x 9.5"W x 3.75"H
• Weight: 3.9 lb
• Dimensions: 12"L x 9.5"W x 3.75"H

Best for: Reusable powersports filter seekers.

Why it ranks #8: Lists a washable, reusable high-flow filter and stated dimensions of 12 by 9.5 by 3.75 inches, but not Harley fitment.

A washable, reusable high-flow filter is the RK-3952’s clearest draw, letting riders refresh the element with low-pressure water instead of routinely replacing it. K&N also claims increased horsepower, sharper throttle response, and a changed engine sound, making this a performance-oriented option for buyers who value repeat filter use.

The supplied specifications list a 12-by-9.5-by-3.75-inch package and one included air filter, so buyers can account for its stated size and straightforward contents when planning a replacement or upgrade. K&N says the filter can go up to 100,000 miles before cleaning under normal highway driving, while low-pressure-water cleaning supports reuse when service is due. The horsepower and throttle-response claims are performance benefits, but the listing does not provide a Harley model-year fitment chart.

Skip it if you need a listed Harley model-year fitment chart before ordering; this listing supplies no specific applications.

This suits riders seeking a reusable K&N powersports filter and the stated performance benefits, especially for normal highway use. Treat the listed dimensions as planning information, not proof of Harley fitment; confirm the application through the seller before choosing it.

Listed on Amazon as: K&N Cold Air Intake System: Powersports High-Flow Air Filter, RK-3952

#9

9. K&N RK-3953 Air Intake

• Weight: 3.9 lb

Best for: Compact K&N filter-system seekers.

Why it ranks #9: Offers a washable, reusable high-flow filter, but the provided product details do not specify Harley compatibility or include a complete intake-kit list.

The RK-3953 is listed with a single high-flow air filter and a 3.9-pound weight, giving buyers a clear picture of the package’s stated contents and handling. Its washable, reusable element and K&N’s claimed horsepower and throttle-response improvements suit riders considering a repeat-use performance filter.

The one-filter package keeps the listed contents simple, while the washable element can go up to 100,000 miles before cleaning under normal highway driving. K&N says low-pressure water can be used to refresh its Powersports filters, which supports reuse rather than routine replacement. The product description also claims increased horsepower, improved throttle response, and enhanced engine sound. No Harley model-year application is identified in the supplied details, so those performance claims do not confirm fit for a specific bike.

Skip it if you need a confirmed Harley application before selecting an intake; this listing provides no model-year fitment details.

This is worth considering if you want a reusable K&N Powersports filter and are focused on the stated response and sound benefits. Its simple contents are clear, but the missing application detail in the supplied listing is a firm fitment boundary.

Listed on Amazon as: K&N Cold Air Intake System: Powersports High-Flow Air Filter, RK-3953

#10

10. K&N RK-3956 Air Intake

• Dimensions: 12"L x 9.5"W x 4.88"H
• Weight: 4 lb
• Dimensions: 12"L x 9.5"W x 4.88"H

Best for: Larger-format K&N filter shoppers.

Why it ranks #10: Lists a washable, reusable high-flow filter and 12 by 9.5 by 4.88-inch dimensions, but supplies no Harley fitment information.

At 12 by 9.5 by 4.88 inches, the RK-3956 has a specific listed package size that helps buyers plan storage and handling before choosing this K&N Powersports filter. Its washable high-flow element is reusable, and K&N claims horsepower, throttle-response, and engine-sound improvements.

The stated dimensions and 4-pound weight provide practical handling and storage references, while the included-components list identifies one air filter. K&N says the washable element can go up to 100,000 miles before cleaning under normal highway driving and can be refreshed with low-pressure water. The claimed performance benefits include increased horsepower and improved throttle response. Although the listing calls it vehicle-specific, the supplied details do not name Harley models or years, so fitment remains unresolved here.

Skip it if you need listed Harley model-year applications to choose; this product’s supplied details do not provide them.

This suits buyers who want a reusable K&N filter and can use the stated dimensions for handling or storage planning. Consider its performance claims alongside the key boundary: the supplied product information does not identify a Harley fitment.

Listed on Amazon as: K&N Cold Air Intake System: Powersports High-Flow Air Filter, RK-3956