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N63 / S63 Upgrades

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 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 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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