For US models; Stage 7. Used with stock CV carburetor. The Thunderslide for Buell has set a benchmark in jet kit design. It incorporates a custom made throttle slide of which the unique profile allows precise control over the slide''s range of movement. It creates a stronger signal; improving fuel atomizing which is essential for a good fuel burn. This provides more power; increased throttle response and improved fuel economy. MCS vehicle fitment: 97-98 Buell M2 (NU)