The new chassis plate features a unique shape at the front and rear. The rear has more torsional flex while still remaining longitudinally stiff. The chassis front has further been more angled to offer better clearance from the tire at full lock. Thus, give more roll clearance in long sweeping turns. The chassis is also narrower to lower overall weight while keeping the overall width and driving characteristics associated. The chassis also no longer has holes in its bottom because the gearboxes are now mounted higher.
7075 aluminum alloy's composition roughly includes 5.6–6.1% zinc, 2.1–2.5% magnesium, 1.2–1.6% copper. It has excellent mechanical properties and exhibits good ductility, high strength, toughness, and good fatigue resistance. Highly useful in applications to allow for weight savings over steel.
The first 7075 was developed in secret by a Japanese company, Sumitomo Metal, in 1935, but introduced by Alcoa in 1943 and was the world's first mass-production usage of the aluminum alloy for the Mitsubishi A6M Zero fighter. Later standardized for aerospace use in 1945 and used for airframe production in the Imperial Japanese Navy.