Re: 37x13.5's on factory 17's?
My mileage dropped from 11.8 to 10.2 when I went up to 37s, but then I slapped on a Flowmaster exhaust and changed the gears to 4.56s; that put me right back at 11.6. Oh, and I'm running the "performance" tune from a Superchips Cortex.
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