Well it is 2.65 or 161 cubic inch....the horsepower figures are optomistic...they make about 850 to 870 right now (37 in of boost), next year they will lower it to 34 in of boost to try and get figures in low 800's. They changed boost recently because at 40 in of boost in 2000 they were getting over 900 horsepower. Of course, at race time the run less to save power, but when full rich and full throttle they can achieve these numbers.
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