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jrdoming jrdoming is offline
Junior Member
Posts: 52
Join Date: Aug 2014
Car: 335i
Default 02-05-2019, 06:46 AM

Originally Posted by j3vr6
How is this different from the JB4 piggyback, though? Are these tunes that compliment JB4 and used in conjunction, or are they just flash tunes that replace the JB4 all together?

They compliment it. They help control some of the things that the jb4 can't coax the ECU to do in regards to fueling while the jb4 continues to control boost and give you the ability to make on the fly map adjustments etc.

2017 340i M Sport. JB4
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