Our standard Hinged Mount is recommended for cockpits with a vertical length of between roughly 36 - 48 inches. If you have a longer cockpit, you can order a replacement bar which comes in either 18- or 24-inch lengths, rather than the standard 11-inch bar that is included, providing you an additional seven inches of length.
 
In general, the 18" bar will be sufficient, however if you have a particularly long cockpit, the 24" will work for you.