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For the cost of that tin plated piece of tin foil (no it's not really made of tin foil...) I would rather buy a K&N Air Filter and put Synthetic Oil into any vehicle I have owned.

I know from years of experience that these two backyard upgrades do work to improve the horsepower and performance of any vehicle that I have bought them for, ranging from a 74 Malibu with a 454 and a TH400 to a 87 Mustang LX 5.0 5 speed.

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