
When the BMW 335i arrived in 2007, tuners jumped at the chance to boost the boosted 3.0-liter inline-six. After a few ECU tweaks, the new 3 series was putting out an additional 70-80 hp and a commensurate increase in torque, and once the 135i and 535i arrived, the market grew accordingly. Recognizing that owners are willing to let their new rides go under the electronic knife, BMW has decided that the aftermarket shouldn't be the only avenue available for drivers looking for more punch from the twin-turbocharged 3.0-liter. The automaker will begin offering an upgrade for the 135i, 335i and 535i in Europe, and it's rumored to be available in the U.S. sometime in April.
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