As you decide to modify your car further the JB4 is set up to grow with your vehicle.

Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. Remember the JB4 does not require any additional modifications or previous stages. Other features include optional in dash gauges for boost and other engine parameters, a programmable shift light, on the fly adjustable torque limiting to aid with launches at the track, an optional 2STEP rev limiter & no lift shifting for manual transmission cars, an optional speed delimiter, and much more.

In addition to several performance maps which can be selected 'on the fly' right from the driver's seat the JB4 includes a 100% stock bypass map, a valet mode, ethanol fuel (E85) support, progressive water/methanol injection support, racing fuel map, an auto tuning map that adjusts the JB4 mapping to your current climate, octane, vehicle condition, and modifications continuously, and for those interested an rpm by rpm user adjustable map. It's everything you need to take your N54 powered vehicle from mild to wild. The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. Update takes about 5min.How about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? All the it needs is power, so the ignition needs to be on and engine off. It does not matter what map the JB4 is on. You just need to install the latest update. Wrong firmware can lead to a lot of problems. Just make sure to download the CORRECT firmware for your unit.

Once installed follow the directions and connect into the JB4 and click on update firmware. In that file you will also have USB cable drivers to install. You need to download and install the JB4 interface. Is there a certain program I need on my laptop? Does my jb4 have to be off in my interface (setting 0/0)? Can I just instal the latest update or do I have to instal every update that I missed one at a time? I have the cable that connects to my Jb4 but i am just unsure how I actually go about updating it. I guess there is a bunch of new firmswares that I need to instal and a new interface though. Ok so I have a JB4 g5 that i installed in August 2013 and after that have never touched.

Jb4 g5 interface program