Quote: Originally Posted by
solis1479 
the 9's have mivec.
an evo 9 will pwn an 8.
Bolt-on for bolt-on = Evo 9 > Evo 8.
But if you're going for a full build then the differences are negligible. Few builders actually swap out the Evo 9 head for the Evo 8 depending on which camshaft setup they prefer.