I'm looking at all the little tricks to get better gas millage, cause apparently CNG cant go on my truck.... So I was wondering if a throttle body spacer plate is a good idea. Do you have one? Does it make a difference like "they" claim? Which is better, straight trough like this http://www.partstrain.com/store/det...vroletblazer19921995transdaptt372734193thbosp or the channel carved version, like this http://exhaustrack.com/i-8493278-airaid-200-540-poweraid-throttle-body-spacer.html claims it spins, or "vortexes" the air.... would apprecaite any advice. Thanks all!