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STUFFSK825 -> hp and mpg increase by doing dual exhaust? (9/7/2007 2:25:21 PM)
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hey everyone i have the 1990 3.8 liter thunderbird base model and want to take the dual exhaust/exhaust manifold/headers off of a supercharged thunderbird at the junkyard (that has the same engine) would this be worth the hassle? how much torque or horsepower would i have increased along with my gas mileage?
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