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2008 Cadillac STS

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I am about to buy me a STS and I have a few questions

1. Should I install a sub system in the trunk? And if so, how much trunk space will I sacrifice?

2. I want to put an aftermarket Exhaust system on it to give it that muscle car sound, which brand should I go with?

3. Can 22 inch rims fit without rubbing or sticking out?

4. What are a few ways to increase the gas mileage and horsepower?

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I really have enjoyed the Corsa 14157 system on my STS-V. It has a good sound, looks great, proved to make more hp on the dyno, and appears to have freed up some MPG.


2016 Cadillac ATS-V gray/black; 2013 Cadillac ATS 2L Turbo Premium (Wife's)

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