Eight variants of the 350Z are available: five Coupes and three Roadsters. All come equipped with one of two versions of the same 3.5-liter V6 engine, and all but two come with a choice of either a six-speed manual transmission or a five-speed automatic. All six-speed manual transmission models get the 300-horsepower engine. Automatics come with the 287-hp version. Standard features include 18 inch wheels; all non-Brembo brake-equipped models get larger rotors; bi-Xenon HID headlights and LED taillights.For 2006, the Nissan 350Z adds the more powerful V6 to all models with the manual transmission. Other functional upgrades include larger wheels, more responsive power steering, better brakes, improved lighting and added audio features.