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Scott Petschke of Alden, New York has contributed an image of his 440 (left) and 250, 1976 Sno-Twisters. For those not familiar, you can always tell a 340 or 440 at a glance by the spitters gap between the cylinders. The 250 uses the same bottom end as the fan engines found in the Trail-Twisters and the 340 and 440 use a wider bottom end.