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JB+ (Stage 2) Plug & Play
Our Price: $279.00

A true plug and play tune offering safe and adjustable 30-60 Horsepower gains at the wheels!
Can be installed and removed in minutes without any tools.

At the default setting of +2.75psi average increases are 40hp and 50tq to the wheels.
For those looking to take things to the max up to +4.75psi can be quickly dialed in!
Does not trigger codes and does not require entering the ECU area for installation.
Compatible with all ECU versions and transmissions for the 2007-2010
BMW 335, 335xi, 135i, 535i, Z4 and Z6 Twin Turbo.
JB4 Juice Box Performance Tuner Stage 4 Plug & Play Free Shipping
List Price: $529.00
Our Price: $529.00
Sale Price: $479.00
You save $50.00!

A must have for any N54 335i Motor. We are offering free shipping, or free local install. E-MAIL us at today.

• 2006-2010 E90 Sedan 335i / 335xi
• 2006-2010 E91 Touring 335i / 335xi 
• 2006-2010 E92 Coupe 335i / 335xi
• 2007-2010 E93 Convertible 335i / 335xi
• 2008-2010 E60 Sedan 535i / 535 xi
• 2008-2010 E61 Touring 535i / 535 xi
• 2008-2010 E82 Coupe 135i 
• 2011+ 335is 
• 2008-2010 E88 Convertible 135i 
• 2008+ BMW X6 xDrive35i 
• 2009+ BMW Z4 sDrive35i 
• 2011+ BMW X5 xDrive35  
• Fully compatible with DCT transmissions! 

Ready to take your BMW twin turbo to the next level?
How about up to 80hp to the wheels (100hp crank) on a completely stock car or up to 180hp to the wheels (215hp crank) on a fully modified car? The JB4 features a simple plug and play installation harness and built in deletion of hidden "tuner detection" codes. Compatible with all ECU versions. With over 4500 in use and tens of millions of customer miles driven the JB Stage3 has proven time and time again to be the safest and easiest way to extract the true potential from your N54 twin turbo!

Now shipping with JB4 featuring 5x the processing power, 2x the memory, more robust signal conditioning, and integrated CANbus. Our new CANbus module allows the JB4 to communicate with your vehicle like never before. New features include code reading/deleting, optional in dash boost, timing, air/fuel, shift light, and IAT gauges, autotuning, a buttery smooth new CANbus based integrated boost control system, map switching on the fly via steering wheel controls, built in downpipe fix, hot/cold oil temperature protection, progressive methanol integration, water pump remapping, gear dependent boost control/traction assist, and much more to come with free firmware updates uploaded using a windows laptop (or mac w/ windows emulator) and BMS USB cable.

In addition to our performance mapping the JB4 features several "on the fly" user selectable maps including a 100% stock bypass map, a 4500rpm rev limited valet mode, a fuel economy map, a progressive methanol map, a race gas map, and for those interested an rpm by rpm user adjustable map. And unlike other flash and piggyback tunes that charge per the map and lock to your VIN the JB4 is 100% unlocked. Meaning you get access to every new feature we release free of charge and when your lease is up will be able to resell the JB4 without penalty.