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Sound. Every exhaust system or muffler has its own unique sound. You can add a Magnaflow muffler to your exhaust for a pleasing, slightly louder-than-stock tone, or you can get an aggressive growl out of a glasspack Cherry Bomb muffler.ufflers. If your exhaust system ended at the catalytic converter, your vehicle would be obnoxiously loud and noisy-far from the high-performance growl you know and love. As their name implies, mufflers reduce the noise coming out of your exhaust to less-than-deafening levels.
If your current exhaust from the catalytic converter back is already an aftermarket system, then purchase the same brand of header. The same brands are always optimized to work well together and will be easier to install.If your car is using the stock exhaust, you can choose your header based on your purpose for it â performance, show, or simply an improvement over stock.he same brands are always optimized to work well together and will be easier to install. If your car is using the stock exhaust, you can choose your header based on your purpose for it â performance, show, or simply an improvement over stock.