Kazuhiko Nagata's Top Secret Nissan GTR

Posted by PAS Staff on Monday, 24 June 2013 in Car Features

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To those familiar with the Japanese tuning scene, the name Top Secret is synonymous with speed and creativity. The company was founded by Kazuhiko “Smoky” Nagata, a man who got his start working for the turbo-tuning experts at GReddy/Trust. Since the release of the Nissan R35 GT-R in 2007 he has set his sights on perfecting the latest version of Godzilla. The gold-painted demo car you see here is the culmination of his tuning efforts over the past four years.

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The R35 GT-R is no slouch to begin with. Off the showroom floor it came with a 3.8-liter twin-turbo V6 engine that was factory rated in Japan for 478 hp and 434 lb-ft of torque. Still, Nagata saw plenty of room for improvement. As with any turbocharged car, the first place to start was the exhaust. Top Secret uses lightweight titanium for their TV-Pro Version 2 cat-back exhaust piping. Closer to the engine, what Nagata labels the #1 Extension Tube and #2 Sport Catalyzer were also fitted for better breathability. The numbers denote the street-legal versions of each piece. Top Secret also offers a #2 Extension Tube that completely deletes the catalytic converter for maximum exhaust flow on a race track.

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The real genius behind the GT-R’s power lies in its upgraded turbochargers. Unlike a Supra or Evo’s engine, a regular stand-alone turbo cannot simply be bolted onto the R35. The stock IHI blowers are molded into the exhaust manifolds, and Top Secret’s High Flow BB units feature the same integrated design. They are also larger - the turbine wheel itself being about 22% wider in diameter versus stock. Although Top Secret offers a few different BB turbo kit options, this golden child showcases their BB900 setup. As you might guess, the number denotes the car’s output, which is a staggering 900 hp and 745 lb-ft to the wheels.

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The carbon fiber G-Effect body kit on their gold R35 was also developed in house, consisting of a new front bumper, hood, side skirts, trunk lid, rear wing, and rear under diffuser. Look closer, and you will be seduced by the detailed craftsmanship given to each panel. The front lip for instance extends 5cm farther than the stock bumper for added downforce, and has two air inlet ports. The rear wing is taller, and its angle can be adjusted by merely stepping on the brake pedal à la the Bugatti Veyron or McLaren MP4-12C. The hood has extra vents up front to release heat, and ducts on the underside that route air directly to the intakes. There are even titanium tow hooks that can be folded back into the bumper when not in use. Matched up with a set of 20-inch Rays VR.G2 wheels the car is nothing short of drool-worthy.

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The stock front seats were ditched in favor of a set of Bride Zeta III’s, each paired with green Takata four-point harnesses. The interior trim is finished off with a set of unique Top Secret GT-R floor mats dyed orange-gold to match the body’s signature paint job. This demo car functions as a proving ground for the parts that Nagata sells to everyday GT-R owners as well as race teams. As such, it retains the factory audio system, navigation, and various driver controls to verify that none of the Top Secret add-ons have had an adverse effect elsewhere. The rearview mirror on the other hand was replaced with a more JDM-style accessory unit. It has an LCD screen to display the video feed from the fender-mounted side view cameras. Simple, but important when it is time to park in warehouse full of expensive customer cars.

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The Nissan R35 GT-R was an improvement on the Nissan bloodline in every way. It was faster, handled better, looked meaner, and ate German supercars for breakfast. It seemed like the pinnacle of Japanese engineering, but as evidenced by Nagata, it was only the beginning of another legend. Top Secret has turned the volume up to 12 for a car that was already playing at 11, and we can’t wait to see what they come up with next.

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