Available in sedan or coupe bodies, trims include DX, LX, EX, EX-L, Si, Si Mugen and GX NGV (Natural Gas). All but the GX and Si trims are powered by a 140-horsepower, 1.8-liter inline four-cylinder with a standard five-speed manual transmission and optional five-speed automatic. The performance-oriented Si, comes with a 197-horsepower, 2.0-liter inline-4 bolted to a six-speed manual. The Si Mugen trim (available in sedan only) is enhanced with Twin-Ring Motegi track-tuned suspension and numerous sporty features. Standard safety features on all Civics include antilock brakes, six airbags, active front head restraints and tire pressure monitoring.For 2008, the Honda Civic adds an EX-L trim, available with optional navigation system, and standard tire pressure monitoring on all trims. Also, Honda introduces the Si Mugen sedan, which is a joint venture by Honda and Mugen Motorsports.