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You really think you are going to feel 5-10hp at the HP these vehicles are at already? Making more noise doesn't do anything other then making more noise. There are plenty of cars making over 1000hp with the stock exhaust. Most of the exhaust companies don't even boast any dyno numbers with their exhaust anymore. For the amount of money an exhaust cost, it's not worth it for the measly hp gains if any it gives. It's all for sound.
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