Kernels are fun because they can help you overclock your rooted HTC EVO for better performance. They can also undervolt your phone for better battery life. Heck, they can even unlock full HDMI mirroring, a feature not included in the EVO 4G.
But sometimes, you just need that stock kernel.
Unfortunately, the EVO 4G's stock kernel has one huge flaw: Wireless-N (802.11n) is broken. And for some reason, HTC completely ignores this bug with every release they put out.
Now, if you're like me and don't need Wireless-N on your smartphone, then this may not be a big deal. But damn it, my EVO has the ability to use Wireless-N WiFi and I want the damn Wireless-N WiFi!
And thanks to OG EVO expert mjhuffer, you can get the stock kernel for the latest 4.67.651.3 OTA update and Wireless-N in one handy flashable .zip. Make sure you wipe your cache and Dalvik cache while flashing this kernel, and it probably wouldn't be a bad idea to make a quick Nandroid backup while you're at it.