A suspension upgrade for 2003 has improved the handling somewhat.

New engine options for 1974 included a 455 two-barrel and the Stage 1 455 "performance package" which added dual exhausts, suspension upgrades and other equipment.

It included the Commando V8 engine, suspension upgrades, larger wheels and tires, special emblems and a tachometer.

The Shelby Z also featured numerous suspension upgrades, including a larger diameter front sway bar and rear disc brakes.

No suspension upgrades were required.

It got further suspension upgrades, massive Brembo brakes, and a large rear wing.

The Senna also had some suspension upgrades and some carbon fiber bodywork.

The suspension upgrade includes new struts/steering knuckles, torsion bars, shocks and mounts and drive shaft.

It featured revised sidepods and suspension upgrades, as well as Renault's RS2 3.5 V10 engine.

The concept featured black on black styling, suspension upgrades and had a wheel and tire package that hinted at what the R-spec was latter equipped with.