Thread: 4.2 stx
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Old 08-27-2008, 10:51 PM
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BrianA
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I had one (MAC) on my 2000, It really made no noticeable difference in power or MPG.
But, after 170,000 miles, it more than paid for itself.

Some folks hate them and say they let too much dirt in the engine.
I never had a problem.
 
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