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Jb4 BMW BMW 335 Performance Jb4 135 335 intakes
JB4 Performance Tuner
N63 / S63 Upgrades

N63 2013 and earlier stage1->JB4 upgrade kit

Upgrades your N63 Stage1 system to an N63 JB4 BETA. The JB4 includes a new control box extra wires that will be added in to your Stage1 harness. It's a more advanced install than Stage1 so carefully review the install directions in the link below . Not compatible with 2014 and later n63tu motors.

Click here for Stage1->JB4 directions and additional information: http://www.n54tech.com/forums/showthread.php?t=40626


JB4 BMW 335i Performance

$399.00
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Full N63 JB4 BETA Kit

This is a Full N63 JB4 Kit.

Click here for Stage1-JB4 directions and additional information

JB4 BMW 335i Performance

$799.00
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M5/M6 s63tu JB4 BETA upgrade kit

This kit upgrades your Stage1 tuner to a JB4 system. Includes a JB4 circuit board, CANbus wires, and an OBDII CANbus adapter. Note those running methanol kits will need to rewire the FSB within their harness when converting to the JB4. Full details and directions are posted to N54tech in the //M section. Does not include the optional s63tu boost control module. Reuses your existing board enclosure.

$400.00
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JB4 Billet Aluminum Enclosure

Our most protective case in the JB4 line-up. The sleek, stylish JB4 billet aluminum enclosure withstands drops, shocks and bumps while protecting electronics from dirt and water. CNC machined with a rubber sealing ring. Ideal for all weather F chassis applications. Made in the USA. Compatible with all BMS JB4 & Stage1 tuners.
$59.00
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JB4 Boost Control Module (BCM)

This add on module connects directly to your wastegate solenoids located behind your intercooler allowing the JB4 to directly control boost.

Starting at $150.00
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