K&N KN-171C Oil Filter – Chrome (Replaces H-D® 63731-99A & 63798-99) ✨🏍️

Engineered for riders who demand pro-level performance, the K&N KN-171C Oil Filter – Chrome (Replaces H-D® 63731-99A & 63798-99) combines high-flow filtration, race-ready construction, and a show-quality chrome finish. Designed for Harley-Davidson® and Buell® motorcycles, this filter delivers maximum oil flow and long-lasting engine protection with effortless maintenance thanks to its built-in 17mm nut.

The Breakdown
✨ Chrome Finish – Durable, polished chrome that enhances your engine’s look.
⚙️ High-Flow Filtration – Resin-impregnated media allows superior oil flow while capturing harmful contaminants.
🔩 17mm Wrench Nut – Quick installation and removal using standard tools.
💧 Anti-Drainback Valve (where applicable) – Prevents dry starts by keeping oil in the filter.
🛠️ PSI Relief Valve – Maintains steady oil pressure in all riding conditions.
🏁 Drilled Safety Wire Holes – Race-ready design approved for MotoAmerica & AMA competition.
🧱 Heavy-Duty Construction – Built to handle extreme temperatures and vibration.
📏 Dimensions – Height: 3.91” | OD: 2.91” | Thread: 3/4"-16 UNF | Weight: 0.8 lb.
🏍️ Direct Replacement for H-D® 63731-99A & 63798-99 – Perfect fit for Harley-Davidson® and Buell® models.

Vehicle Fitment
✔ Harley-Davidson® Road King, Electra Glide, Street Glide, Softail, Dyna, and Sportster models.
✔ Compatible with select Buell® motorcycles.
✔ Fits most Harley-Davidson® models from 1980–present.

Professional-grade performance meets everyday reliability—the K&N KN-171C Oil Filter – Chrome (Replaces H-D® 63731-99A & 63798-99) keeps your ride running strong and looking sharp.