When I started on this forum I tought the hoods would add anything to my car. I was dead wrong, even tought they are functional to get help from them would be noticeable only at high speeds. It is better to get a CAI that replaces the OEM Air Box with a nice Cone Filter. That would do more to your car than the hood, even tought the hoods look awesome. The hood one I like most is the 40 anniversary edition hood.
Of couurse if you are going to add a cone filter do not use a tube to relocate it away from the engine bay. If you go to
http://www.zzperformance.com and check they have a nice article how air turbulence develops on these extension tubes and worst when they have bends. Get a CAI that would allow you to have the Cone in the engine bay really close to the intake plenum.