I recently purchased a BMW 4 Series and I want to make it more powerful. What modifications can I make to increase the horsepower without sacrificing reliability or voiding the warranty?
ReplyFirst, start with an ECU tune to optimize the engine's performance. Then, consider upgrading to a performance air intake and exhaust system. You can also add a larger intercooler to increase boost pressure. Keep in mind, these modifications may void your warranty and could potentially decrease reliability in the long run.
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