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BMW 3-Series (E90 E92) Forum
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JB4 G4 vs G5 ISO
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| 08-16-2015, 05:10 PM | #1 |
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Enlisted Member
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Rep 33
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JB4 G4 vs G5 ISO
Hey all,
Can anyone tell me the main advantages of the G4 vs G5 ISO board? I'm trying to decide if it's worth upgrading. I currently have JB4, AR Down Pipes, and Dual Cone Intakes for performance mods. Also, has anyone heard about a back end flash that can be done? |
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