BMS BMW N54 JB4 Tuning Box (1M, 135i, 335i & Z4)
ADD 100 Horsepower to your Twin Turbo BMW Instantly!
2007-2010 BMW 135 335 535 Z4 X6 and 2011-2013 335is 1M and Z4 N54 Twin Turbo
Ready to take your twin turbo BMW to the next level?
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)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It's everything you need to take your N54 powered vehicle from mild to wild!
In addition to several performance maps which can be selected "on the fly" right from the drivers 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. 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.
Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. As you decide to modify your car further the JB4 is setup to grow with your vehicle. Whether you're racing a 100% OEM car on pump gas or a 700whp single turbo drag queen, the JB4 has the perfect mix of performance, features, flexibility, and support to ensure your car performs to the best of its potential!
To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout.
BMW 1 Series
• 2008-2010 E82 Coupe 135i
• 2008-2010 E88 Convertible 135i
• 2011+ E82 1M
BMW 3 Series
• 2006-2010 E90 Sedan 335i / 335xi
• 2006-2010 E91 Touring 335i / 335xi
• 2006-2010 E92 Coupe 335i / 335xi
• 2007-2010 E93 Convertible 335i / 335xi
• 2011-2013 E92 335is
BMW 5 Series
• 2008-2010 E60 Sedan 535i / 535 xi
• 2008-2010 E61 Touring 535i / 535 xi
BMW X Series
• 2008-2010 BMW X6 xDrive35i
BMW Z Series
• 2009+ BMW Z4 sDrive35i
Fully compatible with DCT transmissions.
Free Next Day Delivery
Free next day UK delivery if ordered before 11am. We can also ship worldwide, simply contact us for a quote.
5 Year BMS Repair Warranty
JB4 Dyno results
Stock, JB4 on a completely stock automatic 135i, on 91 octane
JB4 on an automatic 335i with Exhaust and BMS intake, on 93 octane
JB4, Exhaust, BMS intake, BMS Flash, on 50% E85 fuel
JB4, RB Hybrid Turbo Upgrade, Exhaust, BMS intake, BMS Flash, BMS Methanol Injection, Larger Intercooler, on 50% E85 fuel
JB4 Optional Phone Software
JB4 Plug and Play Video Install Guide
JB4 135i 335i Steering Wheel Controls Demo Video
JB4 Optional In Dash Boost Gauge / Shift Light Demo
JB4 Optional Startup Gauge Sweep
24.5cm x 16cm x 6cm