Set to be shown at the Tokyo Auto Salon, the all-new Mark X GRMN builds on the success of its predecessor which was strictly limited to 100 units. The car is based on the Mark X 350 RDS and the GRMN variant is distinguished by a more aggressive front bumper and larger air intakes. The high-performance model also has a minimalist grille, gloss black accents and 19-inch BBS forged aluminum wheels.The sporty styling continues further back as the Mark X GRMN has a ventilated rear bumper and a four-tailpipe sports exhaust system which is split between a stylish diffuser. Other notable styling features include a rear spoiler and an upgraded braking system with white calipers featuring the GR logo.Customers can also order an optional carbon fiber reinforced plastic roof for ¥270,000 ($2,490 / £1,953 / €2,164). Toyota says the roof removes 22 lbs (10 kg) of weight and helps to lower the car’s center of gravity so owners can "enjoy more agile driving."Inside, drivers will find exclusive ultra suede front sport seats and a leather-wrapped steering wheel with GR badging. Other highlights include carbon fiber trim, piano black accents and alloy pedals.A naturally aspirated 3.5-liter V6 engine resides under the hood where it produces 313 hp (234 kW / 318 PS) and 280 lb-ft (380 Nm) of torque. It is connected exclusively to a six-speed manual transmission which sends power to the rear wheels.Sticking with the performance theme, Toyota says the car has a retuned suspension with revised shock absorbers. The company also modified the electric power steering system to deliver a more responsive feel.Production will be limited to 350 units and pricing starts at ¥5.13 million ($47,336 / £37,122 / €41,113).