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every thing i have read on them sounds like crap. but i wanted to see what others thought about them. whats your opinion, do they help or is it just a piece of shrapnel you stick in you intake tube that acts as a restriction?
I tried one in my '96 Ranger XLT with 2.3L engine...it literally tried starving my engine of the air. The tornado is a bunch of junk. As far as putting a spin on the air and everything they got the right idea but going about doing it the wrong way.