Your eyes are not failing you: yes, that is a stock EVO radiator. How can the CyberEVO get away with it? Well the stock EVO radiator is huge as far as stock radiators go, it's ultra light compared to aftermarket “racing” radiators, the engine only needs to stay cool for one lap and one lap only, Tarzan barely revs the engine over 7000 rpm, and the CyberEVO's engine doesn't make giant horsepower. From what I've heard, the engine only makes 470hp at the wheels at “low” boost and maybe 550hp at “high” boost. The lower radiator pipe is tubular aluminum probably to prevent any chance of collapse. Remember the theme: simple and light.
The intercooler is a custom tube and fin HPI unit. Why tube and fin? Because it's lighter than all of the stacked plate junk on eBay and efficient. HPI is known for value, low cost parts in Japan. You know where most of it's probably made, but at least they aren't using the same stacked plate boat anchor crap that usually comes out of China. We don't have a close shot of the intercooler actually, but if you take a look up close, you'll see that it's actually quite beat up.
While the Unlimited Works guys replace the turbo and clean up the oil spill from the failed turbo, notice the HPI oil cooler and the Audi R8 6 pot monobloc Brembos. Up until 2011 WTAC, the CyberEVO had stock EVO brakes on it, but it needed some insurance to beat the Sierra Sierra EVO so I'm sure Takizawa decided to step it up on the brakes. The RX-6 turbos were probably being run beyond their limit since the engine was optimized for response and an ultra flat torque band. No turbo can handle being run beyond its limits for very long.
A big part of the CyberEVO's success is unquestionably the Voltex aero parts. Here's a shot of the front bumper without the splitter.
This splitter has a lot of stuff going on. I'm sure Nakajima-san at Voltex spent A LOT of time designing and fabricating this splitter. Now I know why Nakajima-san arrives a day early at WTAC and spends nearly the whole day installing and preparing the aero. This thing must be a beast to install. Nevertheless it is a critical part of the CyberEVO's success. Notice the oil cooler duct on the far side also.