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It actually works!
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I was skeptical just like I am sure everyone. But it works. I got 3 MPG better, when they advertised 4-7, but 3 is still amazing. I knew I wouldn't get the full 4-7. I saw a little boost in power as well.
Shipping was a little on the slow side, but it was well worth it.
I have recommended this to others as well.
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