Nissan adds a convertible to go with its 350Z hatchback for 2004. Both are 2-seaters that share a chassis with the G35 sedan and coupe from Nissans Infiniti division. The 350Z hatchback comes in base, Enthusiast, Performance, Touring, and Track models. Nissan calls the convertible the Z Roadster and limits it to Enthusiast and Touring trim. All use a 287-hp 3.5-liter V6. A 6-speed manual transmission is standard. A 5-speed automatic with manual shift gate is available on Enthusiast and Touring models. A power cloth top with heated glass rear window is standard on the convertible, as is a rigid tonneau and a wind deflector. Exclusive to the Touring convertible are optional ventilated-net seat inserts. All Zs share identical suspension settings and come with ABS. Among hatchbacks, Touring versions with manual transmission and Performance and Track models have 18-inch wheels. The 18s are a Touring convertible option. Other Zs have 17s. Torso side airbags are standard on the Touring convertible and optional on ot