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Old 11-21-2007, 09:43 PM   #82
04SilveradoMykk
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Join Date: Jul 2006
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Location: Prescott, Az
Age: 26
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Re: Power Mods for the 99-02 4.3 V6
Underdrive pulley has more noticable gains than the throttlebody.... but the throttlebody is good for throttle response more power with less throttle. I'd suggest both. Everything, all at once
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