Upgrade your turbo for reduced EGT's, faster spool up, and that world famous 6.0L Powerstroke whistle with the drop in KC 10 Blade Turbine Wheel. This is a balanced drop in 10 blade turbine upgrade for the 13 bladed 2003-2007 turbos. This is a nice upgrade for the DIY builder that wants a little more flow on the top end and likes the sound of the 2003 whistle turbo.