On a long highway road trip at 60-70mph, would an exhaust silencer cause any change in gas mileage? Not sure if an exhaust restriction would matter since there is not a huge amount of flow at cruising speeds.
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tekdeus;1130553 said:This one has a valve that opens under high exhaust pressure. Cool idea!
http://www.raceinspired.com/pc-3175...-silencer-gt-spec-and-n1-turbo-universal.aspx