- Softer Manganese guides are easily reamed, and then can be delicately finished with Kibblewhite high quality ball hones
- With any battery operated or electric drill you can ream and hone manganese valve guides in less time
- Expect the same exacting KPMI® tolerances, but with a reduced toughness / wear-ability when compared to premium C630 Nickel Aluminum Bronze valve guides
- Made in the USA
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 2019-2021 | Yamaha | YZ250F | |
| 2021 | Yamaha | YZ250F Monster Energy Yamaha Racing Edition | |