Shop All Categories. K&N Performance Air Filter – High-Flow Original Replacement Element – (HA-1004). Experience increased air flow and performance with K&N’s high-flow air filters, engineered using high quality materials for durability. These filters offer low restriction and excellent engine protection, enhancing your motorcycle’s horsepower and torque. Discover the key features and benefits of the K&N Filters Performance Air Filter. High-flow air filter design: Utilising multiple layers of woven cotton gauze media, the high-flow air filter design ensures low restriction and superior filtration for enhanced performance and engine protection. Increased horsepower and torque: Specifically designed to boost your motorcycle’s power, the increased horsepower and torque provide a noticeable improvement in performance. Large filtration area: The pleated media design offers an extensive filtration surface, resulting in long service intervals and reduced maintenance. Custom fit: Each filter is custom engineered for specific applications, ensuring a precise fit and optimal functionality. Washable and reusable: Pre-oiled and ready to use, these filters can be easily washed and reused, making them a cost-effective and environmentally friendly choice. For riders seeking a high-quality air filter for their motorcycle, the K&N Filters Performance Air Filter stands out with its durable construction and increased air flow. Whether you’re navigating city streets or cruising on motorways, this air filter enhances your motorcycle’s performance, providing noticeable improvements in horsepower and torque. The custom fit ensures a precise seal, maintaining optimal functionality and engine protection even in challenging conditions. Its washable and reusable design also offers long-term cost savings and environmental benefits, making it an excellent choice for any motorcyclist. Elevate your motorcycle’s performance with the K&N Filters Performance Air Filter, engineered for durability and efficiency. 15.09.2025, 09:43:49. Demon Tweeks was established in 1971 to service the needs of the motorsport competitor and our principals of offering top products, quality, service and rapid availability are as important to us today as they were in the very beginning. We are leaders in the supply of race wear, competition and road tuning parts for cars and bikes. Within a staff totalling over 140 is a dedicated sales team servicing upwards of 3000 telephone and online enquiries received every day from the UK and the rest of the world. Our impressive 140,000 sq. That means no additional charges or surprises when your item arrives. If your parcel is lost or damaged along the way, the GSP protections and policies will cover you. CAN I CHANGE MY ADDRESS ONCE I’VE PLACED MY ORDER? I’VE ADDED A NOTE TO MY ORDER, CAN YOU VIEW IT? As you may require it in the event of a claim with your carrier. Monday – Friday: 8.30am – 5.00pm. Saturday & Sunday: CLOSED. Also, during periods of high demand, there may be additional delays in us responding.