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The carbon fiber exterior mirrors, four-pipe exhaust system and the 20-inch aluminum wheels in Yokohama Advan Sports tires complete the list of the exterior mods.

Inside, the sedan's cabin is spiced up with Recaro sport seats, a new leather steering wheel and transmission lever with red stitching and plenty of carbon fiber decorative trim.

Toyota's G Sport division kept the standard Mark X's 318HP 3.5-liter V6 engine but upgraded the mid-size saloon's braking system and suspension hardware while they also added underbody panels to improve the vehicle's aerodynamics.

The automaker is planning to launch G Sport versions of most of its JDM models starting from this summer. Aside from the Mark X, Toyota also showed G Sport concepts based on the FT-86 coupe, Noah and Voxy vans and the Prius Hybrid.

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Unfortunately, Lexus did reveal the weight gains from the extensive use of carbon fiber parts on the sports car.

Other mods include the forged magnesium wheels and sport tires, high-performance carbon ceramic brakes, sport suspension, new exhaust system with a titanium sports muffler and the two-tone bucket seats inside.

Lexus said that the standard IS F's 5.0-liter V8 engine with 423HP (in JDM spec) has been left intact.

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Together with the new nose job that boasts massive Lamborghini-styled air-vents, the Prius CPC gets custom-made fenders, beefy side skirts, new rear bumper with an integrated diffuser and side spoilers, and a large rear wing made out of carbon fiber.

Carbon fiber is also the material of choice for the new hood, roof, the cameras on the doors that replace the exterior mirrors and the rear panel on the trunk door.

The uniquely styled 18-inch alloy wheels that are shod on 215/40 R18 Goodyear tires sum up the exterior modifications.

The Fast and Furious / Racing theme is continued inside with the addition of gauges on top of the dashboard and just above the new steering wheel that's wrapped in Alcantara.

The same material is also used to trim the new Recaro bucket seats and most parts of the cabin.

Despite the go-fast looks, the only performance mods on the Prius CCP concerns the high-performance brake system and the sports suspension that lowers the car's ride height by 10mm up front and 15mm at the rear.

Japanese tuning firm Tommy Kaira will be showcasing a new sport package comprising of numerous aerodynamic add-ons as well as suspension and interior upgrades for the Nissan GT-R R35 at the forthcoming Tokyo Auto Salon that runs from January 15 to 17.

As you can see in the teaser sketches and the photos shot during the development phase after the break, the aero package consists of a front bumper with a lip spoiler, side skirts, extended rear fenders, a rear wing and a chunky rear diffuser, all trimmed in carbon fiber.

Tommy Kaira's tuning kit for the Nissan sports car also includes upgraded suspension parts and interior enhancements in the form of Recaro bucket seats and hand-stitched leather trim.

We'll have more details and photos on Tommy Kaira's Nissan GT-R package closer to the opening date of the 2010 Tokyo Auto Salon.

Source: TommyKaira