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This is not a muscle car from 30 years ago. BMW put a lot of money into research and development, especially on M cars. Don't you think the stock intakes are better than any aftermarket setup? Heat rises, hot air under the hood (turbo cars) is what you are pulling into the intake.
Just remove the carbon filters, and you will see an improvement. Even muscle cars are using ducting to pull cool air from front of the car under the grill, or off the windshield.
Go figure... Performance is what counts.
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