Originally Posted by CBRich

While we're at why didn't they just turbo the engine too? Or come from the factory with a high flow exhaust. Or have a full blown LSD?

The reason is that this is coming from a manufacturer that needs to make certain compromises to sell the vehicle. Better wheels? Base price up, sales down. Better LSD? More noise, sales down. High flow exhaust? More noise, sales down.

Certain cars are made to be dedicated to the track (e.g. Elise) but this car is not. Nissan needs to appeal to a larger audience to turn a profit.