Lexus wanted to make this factory-modified IS a real M3 killer, so rather than tweak and tune the IS's 300 horse V6, the Japanese luxury brand decided to shoehorn a high-revving V8 under the hood. No exact numbers have been given, but Lexus is claiming that this 5.0-liter eight-cylinder will have more than 400 horsepower and 350 lb.-ft. of torque. An engine like this generates a lot of heat, so Lexus engineers slapped on an external oil cooler to keep this engine from cooking itself.
http://cars.ign.com/articles/761/761125p1.html
What do you guys think?