Not necessarily in all cases. Anyone who's raced for any length of time knows there are two price levels: the price to show up and take part, and the price to be competitive. These two price points are VASTLY different. We race a 305 because the price to be competitive is substantially lower than it is with a 410, wing or non-wing. I can somewhat afford to put a competitive 305 on track (equipment-wise anyway, our driver's skill level is another story...), but have zero chance to do so currently with a 410. Showing up to ride around in the back of a 410 race with old tires and 150 hp down on the front-runners holds no interest whatsoever for me. If the 305 series didn't exist, our team wouldn't be running a 410. We probably would have already quit altogether and moved on to other projects away from dirt racing.