Don't waste your money. Complete and total BS. IF it were in each individual intake runner AFTER the injectors, then MAYBE it would work. But swirling the air before it goes through the MAF, then through the throttle body, then into the intake where it will make a 180 loop before it goes into the runner, then gets mixed with fuel before going into the head, I doubt you'd have any "swirl" left.
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." - Benjamin Franklin
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