Nissan adds a convertible to go with its 350Z hatchback coupe for 2004. Both are 2-seaters that share a chassis with the G35 sedan and coupe from Nissan's Infiniti division. The 350Z coupe 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 coupes, 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 other Zs. Head-protecting curtain side airbags are optional on coupes. Traction control is unavailable on the base model, standard on the others. An antiskid system is exclusive to Performance, Touring, and Track models, which are also available with a navigation system. Tracks have a rear spoiler and Brembo-brand brakes with gold-colored accents. Satellite radio is a new option on Touring models for '04. Nissan expects the convertible to account for about 20 percent of Z sales.