- Laboratory flow analysis proves Boyesen dual-stage reeds outperform standard reeds
- They permit greater flow velocity over the entire range of operating pressures
- Increased performance from start-up to top acceleration
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 2001-2003 | Polaris | Pro X 440 | |
| 1998-1999 | Polaris | XCR 440 | |