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Fastchip for the 4.9


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The Fastchip is an expensive way to advance the timing a few degrees. You can get the same effect by advancing the timing a few degrees on the distributer. Yes, you'll gain some power but it'll ping more.

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I felt the fastchip helped the performance of my 4.9L, subjectively. Unfortuately, I got the gtech/pro after the fastchip.

Installation is simple, just pull down the PCM then swap out the chip.


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