Looking for the best breather kits to upgrade your Harley-Davidson? We’ve tested and reviewed the top breather kits that boost airflow, reduce oil leaks, and give your bike a sharp, custom look with easy installation.
Harley-Davidson owners know that the right upgrades can make all the difference. Breather kits are a must-have for improving engine performance and giving your bike a sleek look. Whether you’re cruising on a Sportster or a Big Twin, the right kit can boost airflow, reduce oil leaks, and enhance your ride.
We’ve tested and reviewed the best breather kits for Harley-Davidson models. From chrome manifolds to aluminum filters, these kits are easy to install and built to last. Discover the perfect upgrade to keep your Harley running smoothly and looking sharp.
List of Top 10 Breather Kits for Harley-Davidson
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CHROME HARLEY ENGINE BREATHER MANIFOLD KIT – Fits Big Twin Evolution 1993/1999 & Twin Cam 88 1999/Later |
This CHROME HARLEY ENGINE BREATHER MANIFOLD KIT is perfect for Harley owners who want to upgrade their bike’s look and performance. It’s ideal for those with Big Twin Evolution or Twin Cam 88 models, offering a sleek, custom fit and better airflow. |
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S&S Standard Breather Gear Kit for Harley Davidson L1977-99 Big Twin Models |
This S&S Standard Breather Gear Kit is perfect for Harley Davidson owners who want better performance. It’s ideal for L1977-99 Big Twin models, offering stronger build quality and improved airflow. |
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ENGINE BREATHER MANIFOLD KIT FOR SPORTSTER 1991/LATER |
This ENGINE BREATHER MANIFOLD KIT is perfect for Sportster owners who want to upgrade their bike’s look and performance. It’s easy to install and works great for 1991-2017 XL models. |
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JPPJNDM Motorcycle Crankcase Breather Kit for Harley 1993-2017 for Big Twin for Dyna for FXD for Softail for Touring for FLD for FLS for FXST for Road for Street for Glide for FLHR(Black) |
This motorcycle crankcase breather kit is perfect for Harley owners who want a reliable, long-lasting upgrade. It’s easy to install and fits perfectly with your bike’s original design. |
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S&S Cycle Standard Size Breather Gear Kit Compatible for Harley Davidson FLH Electra Glide 1977-1985 |
This S&S Cycle Breather Gear Kit is perfect for Harley Davidson FLH Electra Glide owners from 1977 to 1985. It’s ideal for keeping your bike running smoothly. |
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KCINT Super Sale CRANKCASE Breather Filter for Harley Engine Parts |
This KCINT Super Sale CRANKCASE Breather Filter is perfect for Harley owners who want to upgrade their engine parts. It’s ideal for those using an aftermarket air cleaner on late model engines. |
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Motorcycle Air Cleaner Breather Intake Filter Kit For Harley Sportster XL1200 XL883 Aluminum Fence Type 2004-2025 |
This Motorcycle Air Cleaner Breather Intake Filter Kit is perfect for Harley Sportster XL1200 and XL883 owners who want a clean, hassle-free installation. It’s ideal for both carbureted and fuel-injected models, offering a reusable filter that’s easy to maintain. |
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MoKitDora Twin Cam Rocker Box Breather Kit for Harley 1999-2017 Touring Softail Dyna |
This MoKitDora Twin Cam Rocker Box Breather Kit is perfect for Harley owners who want to boost their bike’s performance and keep their engine running smoothly. It’s easy to install and built to last, making it a great upgrade for 1999-2017 Touring, Softail, and Dyna models. |
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Kuryakyn 9928 Motorcycle Performance Accessory: Crankcase Breather Kit for 2007-19 Harley-Davidson XL Motorcycles , Black |
This product is perfect for Harley-Davidson Sportster owners with 2007–2019 XL models. It offers a simple, bolt-on upgrade using existing parts for easier installation. |
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Stealth External Breather System Harley Sportster & Big Twin Evo (Black) |
This Stealth External Breather System is perfect for Harley Sportster and Big Twin Evo owners who want a clean, sleek look for their bike. It’s ideal for those using DK Outlaw or similar air cleaner systems, offering easy filter placement and all the hardware needed for a hassle-free upgrade. |
Detailed Reviews
Discover the top 10 Breather Kits for Harley-Davidson, handpicked for performance, style, and value. Each kit is expert-reviewed and rider-approved, ensuring you find the perfect upgrade for your bike. Whether you want a sleek look or better engine performance, this guide has you covered.
1. CHROME HARLEY ENGINE BREATHER MANIFOLD KIT – Fits Big Twin Evolution 1993/1999 & Twin Cam 88 1999/Later
Upgrade your Harley with the CHROME HARLEY ENGINE BREATHER MANIFOLD KIT. It fits Big Twin Evolution 1993/1999 and Twin Cam 88 1999/Later models. This kit lets you use custom flat-backed air cleaner assemblies for a sleek look and better performance.
The two-into-one manifold combines both head vents into one hose outlet. You can route it into your air cleaner or directly into the atmosphere. It comes with breather bolts, manifold pipe, and support brackets for easy installation.
| Pros | Cons |
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Perfect For:
This CHROME HARLEY ENGINE BREATHER MANIFOLD KIT is perfect for Harley owners who want to upgrade their bike’s look and performance. It’s ideal for those with Big Twin Evolution or Twin Cam 88 models, offering a sleek, custom fit and better airflow.
Ready to Purchase?
2. S&S Standard Breather Gear Kit for Harley Davidson L1977-99 Big Twin Models
The S&S Standard Breather Gear Kit is built tough with all-steel construction. It offers better stability and less wear than other options. The welded-in screen keeps things clean and efficient.
This kit boosts airflow more than stock parts. It includes an elongated scavenge hole for better performance. The gear and spacer come ready to install.
| Pros | Cons |
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Perfect For:
This S&S Standard Breather Gear Kit is perfect for Harley Davidson owners who want better performance. It’s ideal for L1977-99 Big Twin models, offering stronger build quality and improved airflow.
Ready to Purchase?
3. ENGINE BREATHER MANIFOLD KIT FOR SPORTSTER 1991/LATER
Upgrade your Sportster 1991/LATER with the ENGINE BREATHER MANIFOLD KIT. This kit lets you fit custom flat-backed air cleaners for a sleek look and better performance. It’s a simple way to boost your bike’s style and power.
The two-into-one manifold combines head vents into one easy-to-route hose outlet. It comes with breather bolts, manifold pipe, and support brackets for a complete setup.
| Pros | Cons |
|---|---|
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Perfect For:
This ENGINE BREATHER MANIFOLD KIT is perfect for Sportster owners who want to upgrade their bike’s look and performance. It’s easy to install and works great for 1991-2017 XL models.
Ready to Purchase?
4. JPPJNDM Motorcycle Crankcase Breather Kit for Harley 1993-2017 for Big Twin for Dyna for FXD for Softail for Touring for FLD for FLS for FXST for Road for Street for Glide for FLHR(Black)
The JPPJNDM Motorcycle Crankcase Breather Kit is built for Harley models from 1993 to 2017. It fits Big Twin, Dyna, Softail, Touring, and more. This kit is 100% factory tested for top quality.
It offers a long service life and stable performance. The easy installation makes it rider-friendly.
This kit is a perfect match for your Harley’s original part. Its high reliability ensures smooth rides every time.
| Pros | Cons |
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Perfect For:
This motorcycle crankcase breather kit is perfect for Harley owners who want a reliable, long-lasting upgrade. It’s easy to install and fits perfectly with your bike’s original design.
Ready to Purchase?
5. S&S Cycle Standard Size Breather Gear Kit Compatible for Harley Davidson FLH Electra Glide 1977-1985
The S&S Cycle Standard Size Breather Gear Kit is a must-have upgrade for Harley Davidson FLH Electra Glide owners. It’s compatible with 1977-1985 models, ensuring a perfect fit.
This kit improves engine performance by reducing crankcase pressure. It’s easy to install, saving you time and effort. The durable design ensures long-lasting reliability.
With precision engineering, this kit meets high standards. It’s built to last, giving you peace of mind. Upgrade your ride with S&S Cycle quality today.
| Pros | Cons |
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Perfect For:
This S&S Cycle Breather Gear Kit is perfect for Harley Davidson FLH Electra Glide owners from 1977 to 1985. It’s ideal for keeping your bike running smoothly.
Ready to Purchase?
6. KCINT Super Sale CRANKCASE Breather Filter for Harley Engine Parts
The KCINT Super Sale CRANKCASE Breather Filter is a must-have for Harley engine upgrades. It works great with aftermarket air cleaners on newer models.
This crankcase breather filter has a dual inlet design. It connects easily using a 3/8″ I.D. line.
Simple to install, durable, and reliable. Perfect for Harley engine parts.
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Perfect For:
This KCINT Super Sale CRANKCASE Breather Filter is perfect for Harley owners who want to upgrade their engine parts. It’s ideal for those using an aftermarket air cleaner on late model engines.
Ready to Purchase?
7. Motorcycle Air Cleaner Breather Intake Filter Kit For Harley Sportster XL1200 XL883 Aluminum Fence Type 2004-2025
This motorcycle air cleaner kit is built tough with billet aluminum and a clear acrylic face plate. It fits Harley Sportster XL1200 and XL883 models from 2004 to 2025. The internal breathing system keeps your bike looking clean and sleek.
The reusable filter is easy to clean—just wash, dry, and re-oil. It works with both carbureted and fuel-injected bikes, so no ECU upgrades are needed.
| Pros | Cons |
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Perfect For:
This Motorcycle Air Cleaner Breather Intake Filter Kit is perfect for Harley Sportster XL1200 and XL883 owners who want a clean, hassle-free installation. It’s ideal for both carbureted and fuel-injected models, offering a reusable filter that’s easy to maintain.
Ready to Purchase?
8. MoKitDora Twin Cam Rocker Box Breather Kit for Harley 1999-2017 Touring Softail Dyna
The MoKitDora Twin Cam Rocker Box Breather Kit is perfect for Harley models from 1999 to 2017. It fits Touring, Softail, and Dyna bikes seamlessly.
This kit boosts engine performance by improving airflow. It also cuts down oil leaks, keeping your engine clean and reliable.
Made from premium 6061 aluminum, it’s strong, durable, and lightweight. Installation is quick and easy, with 24/7 customer support available.
| Pros | Cons |
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Perfect For:
This MoKitDora Twin Cam Rocker Box Breather Kit is perfect for Harley owners who want to boost their bike’s performance and keep their engine running smoothly. It’s easy to install and built to last, making it a great upgrade for 1999-2017 Touring, Softail, and Dyna models.
Ready to Purchase?
9. Kuryakyn 9928 Motorcycle Performance Accessory: Crankcase Breather Kit for 2007-19 Harley-Davidson XL Motorcycles , Black
The Kuryakyn 9928 Crankcase Breather Kit is made for Harley-Davidson Sportster’s. It fits 2007-2019 XL models perfectly. This kit improves your bike’s performance.
It installs between the air cleaner and carb bracket. You reuse the stock breather bolts and hoses. The kit includes a breather adapter and hardware.
This black accessory is easy to install. It’s a great upgrade for your Harley.
| Pros | Cons |
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Perfect For:
This product is perfect for Harley-Davidson Sportster owners with 2007–2019 XL models. It offers a simple, bolt-on upgrade using existing parts for easier installation.
Ready to Purchase?
10. Stealth External Breather System Harley Sportster & Big Twin Evo (Black)
The Stealth External Breather System is designed for Harley Sportster & Big Twin Evo models. It fits all DK Outlaw and many other air cleaner systems. This upgrade gives your bike a super clean look.
It includes stealth banjo fittings at the heads for a sleek appearance. The washable, reusable filter offers flexible placement. You also get 2 feet of hose to place the filter between heads.
All needed hardware is included, even nylon washers for a tight seal. This system is easy to install and built to last.
| Pros | Cons |
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Perfect For:
This Stealth External Breather System is perfect for Harley Sportster and Big Twin Evo owners who want a clean, sleek look for their bike. It’s ideal for those using DK Outlaw or similar air cleaner systems, offering easy filter placement and all the hardware needed for a hassle-free upgrade.
Ready to Purchase?
Buying Guide
Breather kits are a smart upgrade for Harley-Davidson owners. They boost engine performance and give your bike a sleek look.
When choosing the best breather kit, think about these key factors:
- Compatibility: Make sure the kit fits your Harley model. Check the year and type of your bike to avoid issues.
- Material: Look for durable materials like aluminum or chrome. They last longer and handle tough conditions.
- Performance: Choose a kit that improves airflow and reduces oil leaks. This keeps your engine running smoothly.
- Ease of Installation: Pick a kit with clear instructions and included hardware. It saves time and hassle.
- Design: Go for a kit that matches your bike’s style. A sleek design adds to your Harley’s look.
- Price: Balance quality with your budget. A good kit is an investment in your bike’s performance.
With the right breather kit, your Harley will run better and look sharper. Upgrade today and enjoy the ride!