For Suzuki RMZ450 (2018-2023) and RMZ250 (2019-2022) owners looking to enhance their bike's performance, the K&N XStream Series Motocross Air Filter SU-4518XD is a game-changer. Designed with a filter-in-filter concept, this air filter maximizes airflow and dirt-holding capacity, making it perfect for extreme riding conditions.
The SU-4518XD features a unique two-piece design that simplifies installation and removal, especially beneficial for modern narrow-framed motocross bikes. Each filter is crafted with pleated cotton gauze media, which not only increases the surface area for airflow but also provides excellent filtration to keep your engine safe from harmful debris.
Many Suzuki RMZ450 owners have reported that upgrading to the SU-4518XD filter significantly improved throttle response and overall engine performance. One rider noted, "After installing this filter on my 2020 RMZ450, I could feel the difference immediately. The bike pulls harder in the mid-range, and I love that I can clean and reuse it!"
Another RMZ250 rider said, "This filter fit perfectly and was a breeze to install. It definitely helps with airflow, especially when I'm pushing my bike to the limits on the track."
With the K&N XStream Series Motocross Air Filter SU-4518XD, you’re not just getting a filter; you’re investing in a reliable performance upgrade that keeps your engine breathing easy and performing at its best.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Vehicle Make/Model | Year | Trims |
|---|---|---|
| Suzuki RMZ250 | 2019-2024 | Base |
| Suzuki RMZ450 | 2018-2021, 2023-2024 | Base |

K&N, formally known as K&N Engineering, Inc., is the world’s leading manufacturer of washable performance air filters and cold air intake systems. K&N manufactures over 12,000 parts for a wide range of makes and models of motorcycles, cars, SUV, trucks, industrial applications, and more. K&N was founded in 1969 and is headquartered in Riverside, California in a complex of 10 buildings compromising approximately 400,000 square feet. K&N also operates facilities in China, England, and the Netherlands.
In the early 1960s, two motorcycle racers, Ken Johnson and Norm McDonald (K&N) developed a revolutionary idea for an air filter—one that could perform under the demands of dusty, dirty off-road environments. After experimenting with different types of filter media, they discovered that an oiled cotton design allowed the filter to capture contaminants efficiently, and also be washed and reused. It was right then and there that the original K&N High-Flow Air Filter was born. Fifty years later, K&N is still dominating the industry with leading filtration technology and innovative products that offer extraordinary protection for virtually every application out there.
What Makes K&N the Best?All K&N products undergo rigorous testing to make sure they adhere to and exceed demanding quality standards. These tests include power, torque, and airflow tests to confirm that the intake products are maximizing power boost while retaining engine safety. The company stands behind its product 100 percent with some of the most extensive warranties in the business – a Million Mile Limited warranty. K&N’s performance air intake systems are designed to improve airflow to the engine by replacing the restrictive factory system with a single aerodynamic tube and highly efficient filter media. The systems are available in two materials. The first is Polyethylene, which is used to produce 57 and 63 series intake systems. The second one is aluminum, which can be found on the 69 and 77 series intake systems.
Advantages of K&N IntakesThe benefits of adding a K&N intake system to your car are plenty. Firstly, it will increase your vehicle’s horsepower and torque, while also improving fuel economy and the appearance of your engine bay. What’s more, it will deliver a satisfying, more aggressive exhaust note at higher RPMs. Each K&N intake includes an oversized filtering unit, which can go up to 100,000 miles between cleanings, unlike paper filters that can become clogged easily and cannot be washed or reused. In other words, with K&N products, you will never have to replace your air filter again.
Why Install an Aftermarket Intake?Internal combustion engines all work as large air pumps. Air goes in, fuel is added, combustion occurs, and air goes out. This means there are two ways of increasing power: getting more air into the engine or making it easier for air to get out of the engine. Your air intake is responsible for filtering air before it enters your engine. Dirty air can damage the engine cylinder walls, so a high-quality filter is a must-have item. With a K&N system or filter, you increase airflow through the filter, which means more air is pulled into the engine. K&N does this without reducing filtration qualities, so your engine will live a long life.
Purchase K&N Intakes at Vivid RacingVivid Racing carries an extensive inventory of K&N products ranging from air filters, oil filters, air injection systems, fuel filters and pumps, sensors, carburetors, cold air intakes, and much, much more! If you cannot find a particular item above, please call us at (480) 966-3040 and we will help you find it. We are also here to answer any product questions, regarding usage, benefits, and fitment. Don’t delay! Improve your vehicle’s performance today with K&N Intakes.
K&N Oil Filters | K&N Replacement Filters | K&N 57 Series Intakes | K&N 69 Series Typhoon Intakes
K&N 77 Series Intakes