I would say the only downside is a reliance on a stocked supply of meth and it's a tough habit to kick. This unit is going to really shine when paired with the VT535 non intercooler supercharger kit. Someone with that setup needs to contact Shiv and work out an install.
'09 E90 M3 | VF620 SC tuned and coded by BPM | KW V3 | ARC Wheels w/AD08 | OnEighty Lights | AA Signature Exhaust | BMW Performance and IND trim | Recaro Profi and child seats
'13 35i M-Sport X3 | JB4 Stage 1 | BMS Intake | H&R Springs | Gloss black grill | CF Wrap and Coded by me