I have a 2004 Land Cruiser (purchased new) and I wanted to increase mileage and "hopefully" gas mileage. There's a noticeable increase in power, which is great, but the noise coming into the cabin is a little more than I expected when I stepped on it. The sound is fun at first, but after a while I would have liked both the quiet cabin and the extra power. I haven't tracked the mileage closely enough to comment as riding conditions and temperatures are constantly changing.
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