FMF Stainless Steel PowerBomb Header for Kawasaki KLX250S and KLX300R, Part 042385

The FMF Power Bomb is a four stroke header pipe unit that has a unique bulge precisely located in the header system. A "pre muffler" of sorts, the Power Bomb actually lowers sound output because it creates more surface area to absorb the sound medium (exhaust). The surface area of the perforated core lets the sound exit into the absorbing material (steel wool packing) and then allows the air to expand, cool and ramp back up with the higher pressure air. The result? The FMF Power Bomb is instrumental in reducing the decibel level on any four stroke and because of the expansion and contraction on exhaust through the system, the flow has been increased by nearly 10%. That means more power throughout the range.

Upgrade the exhaust performance of your compatible Kawasaki four-stroke motorcycle with the FMF Stainless Steel PowerBomb Header, manufacturer and vendor part number 042385. Designed for Kawasaki KLX300R and KLX250S models, this FMF PowerBomb header incorporates a precisely positioned expansion chamber in the header system. The unique bulge functions as a pre-muffler by increasing surface area within the exhaust path, helping absorb sound while supporting efficient exhaust flow.

The FMF PowerBomb Header is tuned to enhance bottom-to-mid-range performance, making it well suited for trail riding and technical terrain where responsive power delivery is important. Its expansion and contraction effect helps improve exhaust velocity and can increase overall flow by nearly 10 percent, contributing to stronger performance throughout the usable RPM range. The stainless steel construction provides durable service for demanding off-road conditions.

Serviceability is also built into the design. The header allows full access to the oil filter, helping simplify routine maintenance without requiring unnecessary exhaust-system removal. This FMF header is a direct-fit performance component for the listed applications and is intended to work with the motorcycle's compatible exhaust configuration.

Fitment includes 2020–2024 Kawasaki KLX300R and select Kawasaki KLX250S models from 2006, 2009, 2010, 2012, and 2013. Verify the motorcycle year and model before ordering to ensure compatibility with your application. The FMF PowerBomb Header combines improved exhaust flow, reduced sound output, practical maintenance access, and dependable stainless steel construction in one performance-focused upgrade.

Features:

• Performance tuning: Tuned to improve bottom-to-mid-range power delivery on compatible Kawasaki four-stroke motorcycles
• PowerBomb design: Precisely positioned expansion chamber increases exhaust surface area to support sound absorption and exhaust-flow performance
• Exhaust flow: Expansion and contraction through the header can increase exhaust flow by nearly 10 percent for stronger performance across the usable RPM range
• Sound reduction: Pre-muffler-style construction helps lower exhaust sound output by allowing exhaust energy to enter the sound-absorbing material
• Service access: Designed to provide full access to the oil filter for easier routine maintenance
• Construction: Stainless steel header design provides durable performance for off-road and trail-riding conditions
• Fitment: Fits 2020–2024 Kawasaki KLX300R and select 2006, 2009, 2010, 2012, and 2013 Kawasaki KLX250S models
• Part information: FMF manufacturer and vendor part number 042385

Fitment:
2006 Kawasaki KLX250S
2009 Kawasaki KLX250S
2009 Kawasaki KLX250SF
2010 Kawasaki KLX250S
2010 Kawasaki KLX250SF
2012 Kawasaki KLX250S
2013 Kawasaki KLX250S
2014 Kawasaki KLX250S
2015 Kawasaki KLX250S
2018 Kawasaki KLX250S
2019 Kawasaki KLX250S
2020 Kawasaki KLX250S
2020 Kawasaki KLX300R
2021 Kawasaki KLX300R
2022 Kawasaki KLX300R
2023 Kawasaki KLX300R
2024 Kawasaki KLX300R