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Old 08-13-2019, 12:53 AM   #9
Marde
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What I Drive: 2004 ZTW PZEV 2.3 ATX

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Whoops! I forgot to say the obvious...

You do not need a new standalone PCM/ECU (or wire harness) within your race car design UNLESS you have a unique (more expensive) design idea.

The stock PCM can deliver most race car needs, with a Tune, and other mods, and especially if talking about a 2004 Focus.
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