Originally Posted by mikeyg36
It is. In 6 years (intro of LS3) they added 20 hp and 3 MPG highway + 1 MPG city. That's not impressive at all. Imagine if they weren't worrying about increasing MPG? We would see at least 475 HP. The car is very impressive in its design, interior, and handling capabilities.
7% horsepower increase and 11% increase in fuel economy. Yes, what a terrible disappointment