- Developed over years of championship off-road racing
- Max sound output 96db; most models below 93db
- Pounds lighter than stock
- Use with stock or FMF header
- Built-in spark arrestor included
- Easy to repack
- Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available
Fitment (from WPS item title): Yamaha, YFZ450, 2004–2007