--- product_id: 316631536 title: "Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 1990-1999 HARLEY DAVIDSON (FLSTC, FLSTF, FLSTS, FXST, FXSTB, FXSTC, FLHR, FLHT, FLHTC, and other select models) HD-1390" brand: "k&n" price: "631 zł" currency: PLN in_stock: true url: https://www.desertcart.pl/products/316631536-engine-air-filter-high-performance-premium-powersport-air-filter-fits store_origin: PL region: Poland --- # Up to 10% Acceleration Gain 50% More Airflow Boost 10-Year/Million Mile Warranty Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 1990-1999 HARLEY DAVIDSON (FLSTC, FLSTF, FLSTS, FXST, FXSTB, FXSTC, FLHR, FLHT, FLHTC, and other select models) HD-1390 **Brand:** k&n **Price:** 631 zł **Availability:** ✅ In Stock ## Summary > 💨 Ride Faster, Last Longer — The Ultimate Airflow Upgrade for Your Harley! ## Quick Answers - **What is this?** Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 1990-1999 HARLEY DAVIDSON (FLSTC, FLSTF, FLSTS, FXST, FXSTB, FXSTC, FLHR, FLHT, FLHTC, and other select models) HD-1390 by k&n - **How much does it cost?** 631 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/316631536-engine-air-filter-high-performance-premium-powersport-air-filter-fits) ## Best For - k&n enthusiasts ## Why This Product - Trusted k&n brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Upgrade:** Pre-oiled and ready to install in minutes—no mechanic needed, just pure performance. - • **Race-Tested Reliability:** Developed on the world’s toughest tracks to ensure your Harley runs at peak power every ride. - • **Unleash Maximum Airflow:** Experience up to 50% more airflow than standard paper filters for that instant power surge. - • **Eco-Friendly Performance:** Washable and reusable design reduces waste while keeping your engine breathing clean. - • **Engineered for Endurance:** Backed by a decade-long warranty, this filter is built to last the lifetime of your ride. ## Overview The K&N HD-1390 Engine Air Filter is a premium, high-performance replacement designed specifically for 1990-1999 Harley Davidson models. It delivers up to 50% more airflow than disposable filters, boosting acceleration by up to 10%, and comes pre-oiled for easy installation. Backed by a 10-Year/Million Mile Limited Warranty, this washable and reusable filter offers long-lasting durability and eco-friendly benefits, making it the smart upgrade for riders seeking enhanced power and reliability. ## Description K&N performance High-Flow Air Filters are engineered to improve engine performance by increasing airflow up to 50%. Unlike disposable paper filters which must be frequently replaced, K&N Air Filters are washable, reusable, and engineered to last for the life of your motorcycle, ATV, or Side-By-Side vehicle. K&N air filters are backed by our famous 10-Year/Million Mile Limited Warranty, and they provide an environmentally friendly way to reduce landfill waste by avoiding disposable filters. Engineered to fit easily into your factory air box, installation can be completed in a matter of minutes! K&N develops and tests each product on the world’s toughest race tracks, so we can bring the highest level of performance for your journey. Join the millions of customers who have saved money and improved performance by upgrading to K&N filtration. Fitment Information: 1990-1999 HARLEY DAVIDSON FLSTC Heritage Softail Classic; 1990-1999 HARLEY DAVIDSON FLSTF Fat Boy; 1997-1999 HARLEY DAVIDSON FLSTS Heritage Springer; 1999 HARLEY DAVIDSON FXST Softail Standard; 1999 HARLEY DAVIDSON FXSTB Night Train; 1990-1999 HARLEY DAVIDSON FXSTC Softail Custom; 1990-1999 HARLEY DAVIDSON FXSTS Springer Softail; 1995-1998 HARLEY DAVIDSON FLHR Road King; 1995-1998 HARLEY DAVIDSON FLHT Electra Glide Standard; 1990-1998 HARLEY DAVIDSON FLHTC Electra Glide Classic; 1996-1998 HARLEY DAVIDSON FLSTN Heritage Softail Special; 1998 HARLEY DAVIDSON FLTR Road Glide; 1995-1998 HARLEY DAVIDSON FXD Dyna Super Glide; 1993-1998 HARLEY DAVIDSON FXDL Dyna Low Rider; 1996-1998 HARLEY DAVIDSON FXDS Dyna Convertible; 1993-1998 HARLEY DAVIDSON FXDWG Dyna Wide Glide; 1990-1997 HARLEY DAVIDSON FLHTCU Electra Glide Ultra Classic; 1995-1997 HARLEY DAVIDSON FXSTSB Bad Boy; 1993-1995 HARLEY DAVIDSON FLSTN Heritage Softail Nostalgia; 1990-1995 HARLEY DAVIDSON FLTCU Ultra Tour Glide Classic; 1994-1995 HARLEY DAVIDSON FXDS Dyna Low Rider Conv.; 1990-1994 HARLEY DAVIDSON FXLR Low Rider Custom; 1990-1993 HARLEY DAVIDSON FLHS Electra Glide Sport; 1993 HARLEY DAVIDSON FLHTC Classic Anniversary; 1993 HARLEY DAVIDSON FLHTCU Electra Glide Ultra Classic Annv.; 1993 HARLEY DAVIDSON FLTCU Ultra Tour Glide Annv.; 1993 HARLEY DAVIDSON FXLR Low Rider Custom Annv.; 1990-1993 HARLEY DAVIDSON FXR Super Glide; 1990-1993 HARLEY DAVIDSON FXRS Low Rider Conv.; 1990-1993 HARLEY DAVIDSON FXRS-SP Low Rider Sport; 1992 HARLEY DAVIDSON FXDB Dyna Glide Daytona; 1992 HARLEY DAVIDSON FXDC Dyna Glide Custom; 1990-1992 HARLEY DAVIDSON FXRS Low Rider; 1990-1992 HARLEY DAVIDSON FXRT Sport Glide; 1990-1991 HARLEY DAVIDSON FLTC Tour Glide Classic; 1991 HARLEY DAVIDSON FXDB Dyna Glide Sturgis; 1990 HARLEY DAVIDSON FLST Heritage Softail; 1990 HARLEY DAVIDSON FXST Softail ## Features - ULTIMATE LONGEVITY: 10 Year/Million Mile Limited Warranty protects for the life of your vehicle. - ENGINEERED POWER: State of the art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle's acceleration by up to 10%. - EASY INSTALLATION: Pre oiled and ready to install. One of the easiest and most cost effective upgrades for your motorcycle or ATV for quick performance ns. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | K&N Engineering | | Brand | K&N | | Model | Replacement Air Filter | | Product Dimensions | 22.1 x 21.84 x 9.4 cm; 362.87 g | | Item model number | HD-1390 | | Exterior | Other | | Manufacturer Part Number | HD-1390 | | OEM Part Number | ZZ HD-1390 | | Item Weight | 363 g | ## Product Details - **Product grade:** Performance Part - **Brand:** K&N - **Fit type:** Vehicle Specific Fit - **Product dimensions:** 18.7L x 15.2W x 4.3H centimeters - **OEM part number:** ZZ HD-1390 ## Images ![Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 1990-1999 HARLEY DAVIDSON (FLSTC, FLSTF, FLSTS, FXST, FXSTB, FXSTC, FLHR, FLHT, FLHTC, and other select models) HD-1390 - Image 1](https://m.media-amazon.com/images/I/51JHOC1lpTL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/316631536-engine-air-filter-high-performance-premium-powersport-air-filter-fits](https://www.desertcart.pl/products/316631536-engine-air-filter-high-performance-premium-powersport-air-filter-fits) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-27*