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Jb4 BMW BMW 335 Performance Jb4 135 335 intakes
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B48 upgrades

B48 JB4 BETA Upgrade Kit



Upgrades your B48 Stage1 system to a Stage2. The Stage2 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 video and directions in the link below before ordering

Click here for Stage1->Stage2 directions and additional information



$150.00
Not available in California. Worldwide Shipping Available.
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B48 JB4 FlexFuel Wires



For those of you wanting to take advantage of E85 fuel mixtures you'll need this additional fueling connector.

BMW Flexfuel

$25.00
Not available in California. Worldwide Shipping Available.
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