BMW 3-Series (E90 E92) Forum - View Single Post

Fuel-It! · 05-28-2019, 10:38 AM

Ideally you'd want both. JB4 has some great features MHD doens't have and flash tuning does some things not possible JB4 only. If you get the JB4 they give you free MHD flash maps so you save on having to buy maps and custom tuning too.

05-28-2019, 10:38 AM	#7
Fuel-It! Banned 550 Rep 949 Posts Drives: M4, M5, M2C, X4M, 440i, etc... Join Date: Mar 2019 Location: Phoenix AZ iTrader: (0)	Ideally you'd want both. JB4 has some great features MHD doens't have and flash tuning does some things not possible JB4 only. If you get the JB4 they give you free MHD flash maps so you save on having to buy maps and custom tuning too.
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