I found this clip on 2-1 vs 2-2.
The guy talks abit, but the basic differences are explained.
http://www.youtube.com/watch?v=zwjpwC0ZM44

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PCV REPLACEMENT ECU WITH 04 WIRING LOOM STAGE1&2DNA GEL SEAT INSERT LOWERED 20mm FRONT+REAR CLUTCH ARM MOD
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