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Vehicle Information: Model: 911 SC Euro; Year: 1983; Body Type: Coupe; Total Mileage: 10,000;

Hi I have changed my exhaust to 1974 SSI's and a great two outlet Muffler. I would like to know if you have to adjust the CIS for extra fuel. The change in horse power, torque and Sound is worth every cent. The car is smooth but I am worried that the mixture is not rich enough.Thanks in advanceEddie

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