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I just purchased a 2008 Vantage and my dealer is telling me the factory power upgrade + Quicksilver exhaust will get me close to 420bhp. The factory promises 20bhp but I can't find anything on hp increases due to switching to Quicksilver exhaust. anyone have any experience?
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When I took off the Larini Cats on my supercharged AMV8, I lost 20HP and 10TQ at the wheels. I believe you could gain that on your car with a Cat and Exhaust change. It will be very loud though.

If you really want power, why not do what I did - supercharge it.
 

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When I took off the Larini Cats on my supercharged AMV8, I lost 20HP and 10TQ at the wheels. I believe you could gain that on your car with a Cat and Exhaust change. It will be very loud though.

If you really want power, why not do what I did - supercharge it.
What supercharger did you use? Who installed it? I am intrigued, can you post photos or is it hidden under all the plastic engine covers?
 
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