Fast, Clean Oil Changes for Harley & Buell Riders The K&N Harley Davidson / Buell Oil Filter (KN-171B, KN-171C) is built for riders who want quick installs, strong filtration, and reliable engine protection. If you ride a Harley or Buell and need a filter that fits right, seals tight, and removes easily, this is it. No guesswork. No struggle.Product SpecificationsOuter Diameter: 3 inchesHeight: 4.063 inchesThread Size: 3/4"-16Filter Type: Spin-on oil filterFinish Options: Black (KN-171B) / Chrome (KN-171C)Top Design: 17mm hex nut for easy removalApplication: Harley-Davidson & Buell motorcyclesCategory: High-performance oil filter These specs are not just numbers. They ensure proper fit, correct oil flow, and safe engine operation.Key Features and Real Benefits Ever tried removing a stuck oil filter? It’s messy and frustrating. This filter has a 17mm hex nut on top, so you can remove it with a simple wrench.Benefit: Faster oil changes. Less hassle. No slipping tools.Strong Canister for High Pressure This filter is designed to handle higher oil pressure found in V-twin engines.Benefit: No leaks. No deformation. Just steady performance.High-Flow Filtration Media K&N uses a performance-grade filter media that balances flow and filtration.Benefit: Clean oil without restricting flow. Your engine stays protected and responsive.Pre-Lubed Seal for Proper Fit The sealing ring comes ready to install and helps prevent leaks.Benefit: Secure fit on first install. No oil drips after change.Fitment Clarity The K&N KN-171B and KN-171C oil filters are designed for many:Harley-Davidson motorcyclesBuell motorcycles They are commonly used on models that require a 3/4"-16 thread oil filter.Always confirm your OEM filter number or manual before purchase.Installation Insight Installing this filter is simple, even if you are not a mechanic.Apply a small amount of oil to the gasketHand-tighten until snugUse the hex nut only for removal or light tightening That top nut saves time, especially when space is tight around the engine.Who This Is For This filter is a great fit for riders who prefer doing their own oil changes and want the job done quickly without extra effort. It works well for Harley and Buell owners who value simple maintenance and consistent performance.It also suits daily riders and long-distance tourers who need reliability on every ride. If you’ve ever struggled with a stuck filter, this makes the whole process easier and cleaner.Frequently Asked Questions1. What is the difference between KN-171B and KN-171C? Only the finish. KN-171B is black. KN-171C is chrome.2. Does this filter fit all Harley-Davidson bikes? No. It fits many models, but always check your OEM specification.3. What is the benefit of the hex nut on top? It allows easy removal with a wrench, saving time and effort.4. Is this filter good for high-performance engines? Yes. It is designed to handle higher oil pressure and flow demands.5. Can I install this without special tools? Yes. Hand installation is enough. The nut is mainly for removal.6. Does it come pre-oiled?  The seal arrives with pre-applied lubrication yet you should add fresh oil before you install it.The K&N Harley Davidson / Buell Oil Filter KN-171B and KN-171C exists to serve riders who need basic installation procedures along with pure engine lubrication and enduring performance. It solves a small problem—hard oil changes—but that small fix makes every ride easier to maintain.