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If our talking about the throttle-body spacers, they do work and give quicker throttle response and performance. Average gain would be 4-9HP/and 12-14fp of torque and in most cases improve your fuel mileage. Here is also a link to TB spacers for your application.
 

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Nevermind, I figured out what you were refering to.

I have no experience with this product.
Anyone else?
 
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