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does a throttle body spacer do anything for our engine or just a waste of money.I have a friend who wants to sell me one but I heard they don't do nothing for the 5.4 but make a whistling sound.
does a throttle body spacer do anything for our engine or just a waste of money.I have a friend who wants to sell me one but I heard they don't do nothing for the 5.4 but make a whistling sound.