How to increase horsepower in a BMW 4 Series?

I recently purchased a BMW 4 Series and I'm looking for ways to increase its horsepower. I've heard of some aftermarket modifications, but I'm not sure which ones are worth investing in. I also want to make sure I won't be voiding my warranty. Can you give me some advice on what I can do to boost my car's performance without risking any damage or losing my warranty?

One option you can consider is installing a performance chip, also known as a tuning chip. This small device can significantly increase your BMW's horsepower and torque, without affecting your warranty. However, make sure to purchase one from a reputable brand and have it installed by a professional mechanic.

Upgrading your air intake system can also improve your car's performance. By allowing more air to flow into the engine, you can increase your BMW's horsepower and throttle response. Again, be sure to choose a high-quality brand and have it installed by a professional.

Another option would be to install a cat-back exhaust system. This can improve the overall performance of your BMW, by increasing horsepower and reducing backpressure. Just make sure to check your local laws and regulations before making any modifications to your exhaust system.