Sterling,

That's the 3 valve engine right? I love the 500 in the new S. It is the smoothest, sweetest, flattest power band engine I have driven. You can't even tell when its running its so smooth.

I think the 500 and the 400 had different intakes maybe? b/c the plug on the MAF in the 500 is a simple reach down and turn and pull off with plenty of room. First time they ever made anything easy!

Randy