The new structure weighs slightly less than the 350Z. Additional enhancements include the use of a carbon fiber composite radiator housing and strengthening of the rear fender and hatch areas. Rear body torsional rigidity is improved by up to 22 percent and rear body vertical bending rigidity is improved by up to 30 percent. Front body torsional rigidity is improved by 10 percent with an extensively revised body structure, which includes a new front suspension cradle to reduce front body lateral bending, new rear structural reinforcements, and an underbody "V-bar" to help reduce rear lateral bending. The 370Z features a front aluminum subframe, aluminum-alloy engine cradle, aluminum door panels, an all-aluminum hood, and an aluminum hatch. The smaller exterior dimensions and use of more lightweight materials helped reduce weight. The overall width has been increased by 1.3 in (33 mm), the rear track by 2.2 in (56 mm), and overall height reduced by 0.3 in (7.6 mm). Initial release Engineering Īlmost every piece and component of the 370Z has been redesigned from the previous 350Z. 2.3 Fairlady Z NISMO Z-Challenge Spec (2013).2.2 Fairlady Z Coupe, Roadster, Fairlady Z Version NISMO (2012–2020).1.6 Fairlady Z Roadster, Fairlady Z 40th Anniversary (2009–2013).