The 2015 Dodge Challenger is available in eight trim levels: SXT, SXT Plus, R/T, R/T Plus, R/T Shaker, R/T Plus Shaker, 6.4-liter Scat Pack and 392 HEMI Scat Pack Shaker. The engine choices are a 305 horsepower 3.6-liter Pentastar V-6, 375 horsepower 5.7-liter HEMI V-8 with either a six-speed manual or the TorqueFlite eight-speed automatic transmission and a new 485 horsepower 6.4-liter HEMI V-8 engine. Production is scheduled to begin in the third quarter of this year.