I just got an '08 335xi manual, and I'm interested in going to a stage 1 tune. I come from Subaru, where the tuning interface is fairly straightforward. Get a Cobb AccessPort, or use a cable and PC for open source. No hardware to install permanently. For BMW, I see the JB4, which is a permanent hardware installation, and the MHD, which is apparently just a cable like with Subaru. What are the advantages of each? I think I saw mention of using them together?
JB4 is a very fancy piggyback, while MHD flashes the ecu maps.
-Abel
- E36 328is ~210-220whp: Lots of Mods.
- 2000 Z3: Many Mods.
- 2003 VW Jetta TDI Manual 47-50mpg
- 1999 S52 Estoril M Coupe
- 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
- 2019 M2 Competition, self-tuned, 504whp
- 2016 Mini Cooper S
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