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@dogsballs
stall is a modern lock-up convertor (set at 70-80kmh), pretty much drive like normal, may a tad of slip on steep hills. 4.11's don't really change fuel economy that much, total myth. you get off the lights easier, so don't rev them as much, on highway it will be 2400rpm doing 100kmh (instead of stock 1500rpm). i had both of these in my old car, only 5.7 litres and 225rwkw, that ran 11.95. this with way way more hp (290-300rwkw), will run 11.3-5 once set-up, car only 1620kg.