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For 2002-2003 WRX. MBC is the Less expensive one.

Paid $79 for MBC and $250 for Vishnu EMI chip.

EMI chip good for people using MBC and UNICHIP

$100 obo for both.

Will separate, make offer.

EMI wiring instructions and description of EMI below

http://www.vishnutuning.com/ecudown...ser%20Guide.doc

http://www.vishnutuning.com/ecudown...EMI%20FINAL.jpg

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I don't think it will work on the 04, different ECU. I'm really selling the EMI and just giving the MBC with it. But if some one wants the MBC separately then I'll sell it.

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$25 shipped, payment through paypal.

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It's the standard, but never had any boost spikes. Use the factory restrictor in the stock place and set in 3rd gear and it works great. Do you have any form of EM? You know a MBC causes lean partial throttle problems. That's what the EMI is for it switches over the ECU to closed loop fuel map at 20% throttle to keep you from running lean.

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Yes, $75 for EMI shipped, all documentation is available on Vishnu's site.