The OXA KR1 Edition rear muffler is an advanced performance muffler developed for enduro and competition riders looking for a precise combination of power, control and durability, and is designed for KTM EXC TBI 250/300 models for the years 2024–2025. The KR1 was designed to provide optimal gas flow, improved throttle response and available and controlled torque throughout the entire rpm range, with an emphasis on fast and precise riding on variable terrain. The muffler is built from particularly high-quality raw materials, including an advanced internal filling to maintain controlled noise and high durability in heat and intensive riding. Easy Bolt-On installation without the need for special adjustments, and a sporty and rigid design that proves itself in difficult terrain conditions. An excellent choice for riders looking for competitive performance, high reliability and a sharp and precise engine feel.