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presilencer

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Old 09-27-2005, 07:01 PM
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what is the benefit of a presilencer? any performance increase?also what is the difference between arx712a and a rx4 12a?
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Old 09-27-2005, 07:31 PM
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presilencer does what it says. silences the exhaust. it is meant for cat backs, or straight piped exhaust. not sure about increase in performance.
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