The Miata splashes into 2007 with the availability of the new Power Retractable Hardtop (PRHT) to go along with the standard soft top model. Offered trims include SV, Sport, Touring, and Grand Touring. Powered by a 163-hp 2.0L engine, the Miata powertrain can be completed by either a six-speed manual or six-speed automatic transmission. The optional Suspension Package adds Bilstein shock absorbers, a limited slip rear differential, and a sport-tuned suspension. Other options, many of which are port-installed, include a tire pressure monitoring system, a rear lip spoiler, wheel locks, a cargo net, an alarm system, and front and rear mud guards.