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What is the best way to upgrade the exhaust system on a BMW M4?

I am interested in upgrading my BMW M4's exhaust system to improve performance and enhance the sound. What options are available and what factors should I consider?

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There are several options for upgrading your BMW M4's exhaust system. You can choose a cat-back system, which replaces the exhaust from the catalytic converter back, or a header-back system, which replaces the entire exhaust system from the engine to the rear. Factors to consider include your budget, desired sound level, and intended use of the vehicle.

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In terms of performance, a header-back system will usually offer better gains in horsepower and torque compared to a cat-back system. However, a cat-back system is often more cost-effective and can still provide noticeable improvements.

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