Air Cleaner for Harley 103 Reviews: 4 Best Options

If you ride a Harley with a 103 cubic inch engine, you know that a good air cleaner can make a real difference in performance and sound. Upgrading your intake lets your engine breathe easier, which can improve throttle response and give you that satisfying growl.

This guide reviews four air cleaner options that fit various Harley models, including the 103. Whether you want a complete system or just a filter, you’ll find a choice that matches your bike and budget.

NicMachine Air Cleaner – Versatile Fit for Many Models

The NicMachine air cleaner offers a wide range of fitment options, making it a flexible choice for many Harley riders. With four distinct models, you can select the one that matches your bike: Model A fits Sportster 883/1200 from 1991-up, Model B fits Twin Cam engines from 1999-2017 (excluding fly-by-wire models), Model C fits Touring, Softail, and Dyna models from 2008-2017, and Model D fits M8 Milwaukee-Eight engines from 2017-2024. This means if you have a 103 engine in a Twin Cam or M8 bike, there’s likely a version for you. The OPS Black finish with gray and black spike accents gives it a custom look that stands out.

Installation is straightforward for most riders, and the included hardware helps you get it mounted securely. The filter element is designed to provide good airflow while trapping debris, which can help your engine run more efficiently. Keep in mind that you need to verify your specific model year and throttle type before ordering, especially for Twin Cam bikes. Overall, this is a solid option if you want a stylish intake that covers multiple Harley generations.

View all product features

• Model A : Fit For Harley davidson Sportster 883 / 1200 with CV Carb or Delphi EFI 1991-UP air cleaner air filter intakes.
• Model B : Fit For Harley 1999-2017 TWIN CAM (EXCEPT: FBW) , 2001-2017 Twin Cam Delphi EFI (Fuel Injected) 1999-2006 Twin Cam CV Carb ***NOTE: Will NOT fit Fly-By-Wire Models: 08-17 FLT Touring / 16-17 Softail / 16-17 Dyna FXDLS & 99-01 F.I. FLT .
• Model C : Fit For Harley 2008-2016 FLT Touring / Bagger – FLHT / FLHR / FLHX / FLTR / H-D FL Trike , 2016-2017 Softails , 2016-2017 Dyna FXDLS , 2014-2015 FLSTNSE / 13-14 FXSBSE / 11-12 FLSTSE ****NOTE: Twin Cam models equipped w/ FBW (Fly-by-Wire or Throttle-by-Wire) .
• Model D : Fit For Harley davidson 2017-2022 M8 Milwaukee-Eight engine : 2017-2022 FLT Touring / Bagger – FLHT / FLHR / FLHX / FLTR 2018-2024 Softail Models air filter cleaner intakes .
• Model E : Fit For Harley 2023-later Touring CVO（FLHXSE, FLTRXSE）, 2024-later Street Glide（FLHX）, Road Glide（FLTRX）,Road glide CVO (FLTRXSTSE), 2025-later Street glide Ultra (FLHXU) and 2025-later Softail models air cleaner intake filters .

---

NicMachine Air Cleaner Model D – For M8 Engines

This NicMachine air cleaner is specifically designed for Model D applications, which covers Harley M8 Milwaukee-Eight engines from 2017-2024. It fits Touring and Bagger models like FLHT, FLHR, FLHX, and FLTR, as well as Softail models from 2018-2024. If you have a 103 engine in an M8 bike, this is a direct-fit option that doesn’t require major modifications. The OPS Black finish with gray and black spike accents gives your bike a rugged, aggressive appearance that complements the M8’s modern lines.

The filter element is washable and reusable, which saves you money over time compared to disposable filters. It also allows for increased airflow, which can help your engine produce more power and a deeper intake sound. Installation is simple with basic tools, and the kit includes everything you need. Just make sure your bike is within the listed model years and engine type. This is a reliable choice if you want a performance upgrade that also enhances your bike’s look.

View all product features

• Model A : Fit For Harley davidson Sportster 883 / 1200 with CV Carb or Delphi EFI 1991-UP air cleaner air filter intakes.
• Model B : Fit For Harley 1999-2017 TWIN CAM (EXCEPT: FBW) , 2001-2017 Twin Cam Delphi EFI (Fuel Injected) 1999-2006 Twin Cam CV Carb ***NOTE: Will NOT fit Fly-By-Wire Models: 08-17 FLT Touring / 16-17 Softail / 16-17 Dyna FXDLS & 99-01 F.I. FLT .
• Model C : Fit For Harley 2008-2016 FLT Touring / Bagger – FLHT / FLHR / FLHX / FLTR / H-D FL Trike , 2016-2017 Softails , 2016-2017 Dyna FXDLS , 2014-2015 FLSTNSE / 13-14 FXSBSE / 11-12 FLSTSE ****NOTE: Twin Cam models equipped w/ FBW (Fly-by-Wire or Throttle-by-Wire) .
• Model D : Fit For Harley davidson 2017-2022 M8 Milwaukee-Eight engine : 2017-2022 FLT Touring / Bagger – FLHT / FLHR / FLHX / FLTR 2018-2024 Softail Models air filter cleaner intakes .
• Model E : Fit For Harley 2023-later Touring CVO（FLHXSE, FLTRXSE）, 2024-later Street Glide（FLHX）, Road Glide（FLTRX）,Road glide CVO (FLTRXSTSE), 2025-later Street glide Ultra (FLHXU) and 2025-later Softail models air cleaner intake filters .

---

K&N Cold Air Intake System – Dyno-Proven Power

The K&N cold air intake system is a high-flow upgrade designed to increase horsepower and torque for your Harley. It fits select 2008-2017 models, including those with the 103 engine, such as Touring, Softail, and Dyna bikes. K&N backs their claims with dyno testing, and each system includes a dyno report so you can see the actual gains. The less restrictive path for cool, oxygen-rich air helps your engine perform better, especially during acceleration and when towing. You’ll also notice an improved engine sound—a satisfying growl on throttle that settles to quiet at cruise.

Installation is straightforward with the included hardware and instructions. The system is designed to be a complete replacement for your stock air cleaner, so you don’t need extra parts. It also improves uphill performance and towing capability by enhancing throttle response. The filter is washable and reusable, which reduces long-term costs. Keep in mind that you should verify your specific model year and engine size to ensure compatibility. This is a top choice if you want proven performance gains and a deeper exhaust note.

View all product features

• GUARANTEED INCREASE IN HORSEPOWER & TORQUE: K&N cold air intake systems provide a less restrictive path for airflow, increasing the volume of cool, oxygen-rich air into your engine.
• DYNO TESTING YOU CAN TRUST: K&N air intake horsepower/torque testing is performed on wheel-based dynamometers and the reports are included with each intake system.
• IMPROVED ENGINE SOUND – HEAR THE GROWL: K&N’s intake systems allow your engine to breathe and sound as it should- your engine will growl on acceleration and return to quiet once at speed.
• BETTER TOWING: K&N Air intake kit improves acceleration and uphill performance when towing by improving throttle response, overall horsepower and torque. Excellent for daily and highway driving.
• PREMIUM ENGINE PROTECTION FROM A TRUSTED BRAND: K&N air intake will not void manufacturer vehicle warranty & No-Hassle Lifetime Limited Warranty protects for the life of your vehicle.
• HIGH-FLOW REUSABLE AIR FILTER: 4 layers of pleated, breathable cotton with K&N’s red filter oil to absorb dirt & dust particles, allowing clean air to continue flowing into your engine, only needs cleaning every 100k miles under normal highway conditions.
• EASY TO INSTALL: Includes detailed, step-by-step instructions & all necessary parts- the entire air intake system can typically be installed in less than 60 minutes with basic hand tools.
• MADE IN THE USA: Proudly made in the USA for trusted quality & reliability and backed by US based customer support.

---

K&N Engine Air Filter – Drop-In Upgrade

If you prefer to keep your stock air cleaner housing but want better airflow, the K&N engine air filter is a simple drop-in replacement. It fits 2009-2017 Harley Davidson models, including Fat Bob, Dyna Low Rider, Wide Glide, Switchback, CVO Limited, and other select models with the 103 engine. This high-performance filter is designed to increase horsepower and acceleration by allowing more air into the engine. It’s also washable and reusable, so you can clean it and reuse it for the life of your bike, saving you money on replacements.

The filter uses K&N’s premium cotton gauze media, which provides high airflow while still trapping dirt and debris. Installation takes just minutes—remove the old filter, drop in the new one, and secure it. You’ll notice a slight improvement in throttle response and a bit more intake sound. It’s a cost-effective way to upgrade your air intake without changing the entire system. Just make sure your bike is listed in the fitment guide. This is an excellent option if you want a quick, hassle-free performance boost.

View all product features

• Fit type: Vehicle Specific
• Designed to increase horsepower and acceleration
• Washable and reusable lifetime air filter
• High air flow with excellent filtration
• Lasts up to 50,000 miles before cleaning is required depending on driving conditions

---

Buyer’s Guide: What to Consider

Choosing the right air cleaner for your Harley 103 involves a few key factors. Here’s what to consider before making your purchase.

• Engine Compatibility: Ensure the air cleaner fits your specific Harley engine, such as the 103 Twin Cam or M8. Check model years and throttle type.
• Filter Type: Choose between washable/reusable filters for long-term savings or disposable ones. K&N and NicMachine offer washable options.
• Performance Gains: Look for dyno-tested systems if you want verified horsepower and torque increases. Cold air intakes often provide the best gains.
• Installation Effort: Some kits are direct bolt-ons, while others may require tuning. Consider your mechanical skill level before purchasing.
• Style and Finish: Air cleaners come in various finishes like black, chrome, or spike designs. Pick one that matches your bike's aesthetic.

Conclusion

Upgrading your Harley 103’s air cleaner is a smart way to improve performance and sound. Whether you choose a complete system from NicMachine or K&N, or a simple drop-in filter, each option offers unique benefits.

For the best balance of style and versatility, the NicMachine multi-model cleaner is a great pick. If you want proven power gains, go with the K&N cold air intake. For a quick upgrade, the K&N drop-in filter works perfectly.