Big Gun Exhaust system....
Web Link For Baja Designs
Big Gun Exhaust with Tapered Headpipe YZ/WR $299.00. Retail for this setup is: $367.95. You save $68.95. Fits 98-02 WR400/426,98-02 YZ400/426. The YZ needs the WR mounting grommet. Part number for this grommet is: 22W-24181-00-00 and sells for: $3.56. Note: This pipe was a display model and has some scratches but has never been used
Sounds like there only might be one?