I completely forgot that the Magnaflow V6 exhaust had the outlets on the same side of the muffler and one routed back to the passenger side. That exhaust should be perfect for what you're looking for. But don't try to compare your current winter gas mileage now to what it does if you install it later on when the temps are closer to 60 degrees out. I think I'm getting my worst mileage of the winter right now looking at my readings.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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