Originally Posted by evo_z

The Evo 8 and 9, other than the addition of MIVEC, have pretty much the same. They're both 4g63 engines. If I'm not mistaken, the biggest difference is the turbo. 9 owners on the board have reported dyno numbers on stock IXs of around 280hp. Some have actually gotten into the high 12s with just an intake and exhaust. Also, the IXs suspension is a tad softer to give it a bit more compliance over the VIII. It doesnt diminish any performance in that department, just makes it a bit more civilized on uneven roads.