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      02-15-2012, 12:43 PM   #86
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Drives: '07 335i MT
Join Date: Jun 2010
Location: Portland

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Originally Posted by holmes011 View Post
i know im going to probably going to get shit on for this but whats the difference between flash and piggyback? i did research and it got me here but i still am unclear
Think of the piggyback as the man in middle. It reads from sensors, does its thing and then sends the resulting signal (with its alteration) to the ecu.
'10 E92 335i , COBB
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