FYI for those that are interested, looks like the GTR was making aroun 800rwhp:
"While Oleg's car does indeed have our ALPHA 12 turbo kit and some of our bolt ons the engine in the car is not an AMS one. It's actually an engine that Oleg himself built as a temporary solution as his previous motor (also not an AMS one) had been damaged. Oleg's car has a simple 3.8L engine in it with 100% stock cylinder heads and cams. Chris did indeed tune Oleg's car when he was down there and he said its making somewhere in the neighborhood of 800whp.Due to the 3.8 and stock heads were were limited on how much power we could make and to what RPM level we could spin the engine to.
Yes Yuri's blue car is much faster but i'm impressed with what Oleg's car is doing. Keep it up!!"