335xi Performance Bang for the Buck
I just purchased a 2008 335xi coupe with a 6-speed manual. I'm interested in boosting the power but am not interested in throwing money at mods with little impact....don't tell me to buy a CAI.
I did a little looking around and it looks like the following might be a good start. Am i off path or is this a good place to start?
JB4 PNP (N54 Stage 3) plus BMS USB Cable combo
BMS WW Quick Install Meth Kit w/ JB4 FSB Integration
BMS 135i 335i 3" Performance Downpipes
prices are from burgertuning
Do the BMS downpipes fit an 335xi or just the 335i? If I take the cat out of the down pipe, can i tune out the downstream o2 with the JB4 PNP? I'm not going to buy 50/50 meth/water. Is a meth kit worth it if i only run -30 degree F washer fluid? The info for the JB4 said it will automatically update the air/fuel for e85. Can you run e85 without going to higher flow injectors and fuel pump? how does the JB4 know what % of alcohol is in the fuel?....at wot is the air/fuel set by fixed table, automatically adjust based on a OEM o2 a wide band or are tables adjusted automatically based on air/fuel trim at low throttle?
I don't know anything about BMW's so any other suggestions would be appreciated.