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Q: Do i have to keep on all 4 converters on the exhaust?

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I have flowmasters on it with the stick h pipe and I want it to sound louder what do I have to do?
My car has a manual transmission.

Hello. There are a few things you can do depending on your local emissions regulations. Most do not allow you to modify the converter configuration. You need to check with local authorities first. The best way to do this though would be to is tall high flow converters as they will help significantly. You may need to keep all four which can be expensive, but it will help with performance.

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