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Originally Posted by RCZ +1 Couldn't have said it better. However, i think they are just adding the "rigidity" figures because the swaysbars and the front strut tower make it more rigid... Nothing we can't do aftermarket. Its a nice lightly modded 370Z for those who want it more focused, but don't want to modify it. I love the front end and sideskirts. If they aren't 302042340250 Yen, my mind is made...unless someone comes out with a decent aftermarket kit.

Underneath its showy aero bits, the 2009 Nismo 370Z is no less hard-core than the 350Z Nismo. Autech still takes the standard Z-car chassis off the assembly line and welds the seams of the unit body by hand — a labor-intensive process that increases structural rigidity beyond that of a normal, spot-welded unibody. Mass dampers are then fitted between the unibody's left and right frame members to control the extra vibration inherent in a seam-welded chassis.

Of course, there are extensive suspension changes, too. The Nismo Z gets hollow antiroll bars, so they're lighter than the ones on the regular 370Z. The front bar is just 15 percent stiffer, but the rear antiroll bar is 50 percent stiffer, so the Nismo 370Z should turn in so quick, it'll seem it all happened yesterday already. The front strut tower brace is stiffer, too.

Overall, the 2009 Nissan Nismo 370Z has 40 percent better front-end rigidity than a regular Nissan 370Z. As for the rear end, it's a huge 140 percent more structurally rigid. Roll stiffness is up 15 percent, too. So, yeah, you're going to notice something's up as soon as you get into the Nismo Z.