Looking to get the most out of your BMW?  Want to safely gain a significant amount of boost and horsepower at a very reasonable price? You own the "Ultimate Driving Machine," so why not push out all the "juice" you can from your N54 engine. The new JB Plus is a true plug and play tune offering safe and adjustable horsepower gains ranging from 25-70whp depending on your personal setting and can be removed easily in minutes without using any tools at all.
   
This system will not trigger and codes and does not require you to enter the ECU area for installation. Installation is extremely easy! If you're looking to get a significant boost in power without spending a bunch of money then this is the perfect solution for you. There is nothing else on the market that safely gives you this much power at such a low price!
   
The default setting increases boost by 2.75psi giving you 40hp more and 50tq to the wheels! If you really want to get all that you can out of it you can up the boost 4.75psi safely. Adjusting boost is as easy as turning a knob.

Click here for the install guide

JB+ Dyno on a stock 335i with 91 and 93 octane: