I forgot about that Tornado thingy too...that things good for about 5 MPG AND about 50 HP

 

haha, me too. But you forgot to mention that it does it gives you 5 more mpg WHILE making 50 more hp



anyway, no single test is going to prove anything. airflow is complex and dynamic. Throwing roof marker lights on could mess up the results. EC vs RC, Long bed vs short, blah blah. In all honesty, the geometric of a truck is so fucked that I dont think much of anything will make it significantly better or worse. think polishing a turd. Its turd- you're not going to make **** much better or worse than ****.