Edit:
Here's your answer...straight from Dinan (Dinan numbers are 3 PSI)
Quote:
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Both go to +4 PSI i believe. Difference in claims come from Dinan reporting the gains in the Sport + mode of the unit (+3 PSI) versus totally maxed out on Race (+4 PSI). Not everyone may want the drivability associated with +4 PSI on 91 octane so we wanted to report numbers that everyone would get without having any hiccups. Dinan is essentially under reporting.
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'02 S54 M3 (500/500 GC/Koni)
'08 N54 135 (JB4, DCI, BMW PS/Bilstein B6s, H&R M3 FSB, Strongflex FCABs)
'14 N55 X1 (JB4, BMS DP, BMS Intake, Alpina TCU reflash, H&R Sports, Bilstein B6s, E93 M3 RSB, Strongflex FCABs, baby seat)
'08 N54 535xi touring (Bilstein B6s, Downpipes, MHD tune, baby seat)