The Victa Utility mowers with PT's I have ,all have straight inlet manifolds , the Power Torque with more power has a High compression head and a straight manifold and a different jet in the carby and with the heavier boss ,the motors with the heavier boss have straight manifolds but not all straight manifold motors have the heavier boss. I haven't looked at all the latest PT's but I would think all the newish ones have the straight manifold.
