Description
Features
- Latest addition to the ProX program is the Steel Intake and Exhaust Valve & Spring Kits. This kit is offered as an alternative where the OEM application uses Titanium valves. ProX has now developed the Steel Intake and Exhaust Valve & Spring Kits, containing a set of steel intake or exhaust valves plus a set of specially designed stronger valve springs. The ProX kit just replaces the OEM valves & valve springs and can be installed using the OEM retainers, bases and valve seals.
- Comes as complete package for quick, easy and cost efficient replacement
- Nitrided valves offer high microhardness while supersmooth surface finish reduces friction between stem and guide
- Special stronger valve springs deal with the extra weight of the steel valves
- Fully rebuildable with OEM retainers, bases and seals without the need of any further engine modifications
- Steel Valves for increased durability and less wear under extreme conditions
- Springs are made from premium chrome vanadium steel for higher performance and durability at high rpms
| 2015 | Gas-Gas | EC 450F |
| 2014 | Gas-Gas | EC 450F |
| 2013 | Gas-Gas | EC 450F |
| 2015 | Yamaha | WR450F |
| 2014 | Yamaha | WR450F |
| 2013 | Yamaha | WR450F |
| 2012 | Yamaha | WR450F |
| 2011 | Yamaha | WR450F |
| 2010 | Yamaha | WR450F |
| 2009 | Yamaha | WR450F |
| 2008 | Yamaha | WR450F |
| 2007 | Yamaha | WR450F |
| 2006 | Yamaha | WR450F |
| 2005 | Yamaha | WR450F |
| 2004 | Yamaha | WR450F |
| 2003 | Yamaha | WR450F |
| 2009 | Yamaha | YZ450F |
| 2008 | Yamaha | YZ450F |
| 2007 | Yamaha | YZ450F |
| 2006 | Yamaha | YZ450F |
| 2005 | Yamaha | YZ450F |
| 2004 | Yamaha | YZ450F |
| 2003 | Yamaha | YZ450F |
