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BMW 135i increase boost 0-60 times JB4
N54 JB4 Upgrades

N54 JB4 G5 upgrade kit

Upgrades your JB3 or JB4 G4 control box to the latest JB4 G5 ISO processor and firmware.
Enclosure included
.

$175.00
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JB4 BMW performance tuner
JB4 BMW 335i Performance

JB4 2580 master chip

This replaceable chip controls the communications between the JB4 and your BMS data cable or JB4 Mobile kit as well as the model specific firmware. If damaged you will not be able to connect to the JB4. Be sure to specify which firmware you need in the drop down for the chip to work properly with your model.

$25.00
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CANbus Interface JB4 N55 BMW

JB3->JB4 power wire

This power wire is required if updating from a JB3 harness.

$10.00
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JB4 power wire

G5 speed limit defeat wires

Allows G5 board to remove your speed limiter. Not required if also equipped with BMS flash. Operating a vehicle at high speed involves extreme risk including the risk of serious injury or death and should only be attempted by professional drivers in a closed environment. Use subject to terms and conditions posted. Requires BMS DATA cable.

$10.00
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G5 2STEP Relay for manual transmissions

Enables G5 2STEP rev limiter for more consistent manual transmission launches and no-lift / flat foot shifting. Requires BMS DATA cable.

$35.00
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JB4 3.5bar and 4bar plug and play TMAP adapters

Use these plug and play adapters to quickly adapt a 3.5bar or 4bar TMAP sensor to your N54, raising the boost maximum boost range from 20psi factory up to 36psi for the 3.5bar and 43psi for the 4bar. For most applications the 3.5bar adapter is suggested which requires OEM BMW sensor part number: 13627843531. For very high boost applications the 4bar adapter can be used which requires Bosch 4bar sensor part 281002576.

$32.50
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TMAP Adapter JB4

Replacement factory N54/N55 boost solenoid

Worn or tired boost solenoids result in less vacuum reading your wastegate and boost falling below target. Replace them with these OEM quality parts. N54s use two solenoids, while N55s use one.

$99.00
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TMAP Adapter JB4

JB4 single turbo boost solenoid

Low frequency MAC solenoid with plug and play connector for use with JB4 MAC solenoid single turbo firmware.

$49.00
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TMAP Adapter JB4

JB4 anti-lag kit

Includes programmed chip and wiring harness to allow on the fly anti-lag. Select a gear, hold down the volume button, floor the car, and once boost has built up release the volume button to instantly take off under full boost. Absolute must have for rolling races of any transmission type and works well for automatics off the line too. Requires a BMS back end flash map and ethanol fuel is strongly suggested. Installation directions and additional details are posted here.
$35.00
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Replacement N54 JB4 PNP harness

Upgrade your old JB wiring harness to the latest JB4 G5 ready plug and play harness. Includes a completely new harness prewired for the lastest G5 ISO board.

$304.00
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Juice Boc JB3 Plug & Play Harness

JB4 port injection control module

$299.00
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High temp JB4 enclosure

This new enclosure is made from a temperature resistant resin and is a direct replacement for all existing JB4 enclosures. Other than being able to withstand higher temperatures before deforming there is no functional difference between this and the previous enclosure.

$10.00
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By purchasing any of these items you agree to the Terms and Conditions.

 
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