S58 JB4 Tuner for 2021+ BMW G80 M3, G82 G83 M4, & 2023+ G87 M2

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Description

S58 JB4 Tuner for 2021+ BMW G80 M3, G82 G83 M4, & 2023+ G87 M2Gains are 80whp 100wtq on pump gas and up to 150whp 175wtq on higher octane or E85 mixtures. BOTH VERSIONS NOW INCLUDE THE FREE JB4PRO APP! The ultimate tune for your S58 powered G87 M2, G80 M3, or G82 M4, the JB4 allows you to go from factory stock to full race and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune, including user adjustable 1st and 2nd gear boost limiting,

• (2) MAF sensor screws

have our Stage 2 upgrade and want to upgrade to Stage 3

A complete plug and play solution by simply adding the secondary module to your existing Stage 2 bucketless kit found here

BMS Specialty Spark Plug Feeler Gauge

• Freestanding with a flat bottom

Ethanol Content Tester gives you a fast

Looking to install methanol injection

These install over your factory tips for a clean factory-like look

Power gains of up to 80 horsepower to the wheels (100hp crank) are possible on a completely stock vehicle running pump gas with the B58 engine

JB4 Bluetooth Connect Kit Install Guide

3 volts = 60% ethanol

• 2012-2015 F20 F21 N55 BMW M135