Read this. I don't need it cause my car in turbo diesel but for non turbo cars....maybe....
http://cgi.ebay.com/ebaymotors/94-06-Toyota-Tacoma-all-Air-Razor-Vortex-Generator-MPG_W0QQcmdZViewItemQQcategoryZ42604QQihZ014QQitemZ330020403129QQrdZ1
Studies have shown stationary vortex generators greatly increase an engines airflow and fuel atomization for more horsepower (up to 20%) and better fuel efficiency (up to 35% increase). The idea is simple, spiraling air moves with greater velocity and efficiency through a cars intake tract. More air=More power, its that simple. Additionally the spiraling air atomizes the fuel better allowing for more complete combustion. Your cars computer reads the changes and compensates by eliminating excess fuel delivery, resulting in better fuel efficiency. Also, believe it or not, vehicles with Auto Trans will shift smoother than ever
http://cgi.ebay.com/ebaymotors/94-06-Toyota-Tacoma-all-Air-Razor-Vortex-Generator-MPG_W0QQcmdZViewItemQQcategoryZ42604QQihZ014QQitemZ330020403129QQrdZ1
Studies have shown stationary vortex generators greatly increase an engines airflow and fuel atomization for more horsepower (up to 20%) and better fuel efficiency (up to 35% increase). The idea is simple, spiraling air moves with greater velocity and efficiency through a cars intake tract. More air=More power, its that simple. Additionally the spiraling air atomizes the fuel better allowing for more complete combustion. Your cars computer reads the changes and compensates by eliminating excess fuel delivery, resulting in better fuel efficiency. Also, believe it or not, vehicles with Auto Trans will shift smoother than ever