It was a revolutionary and lofty goal back in 1990: To design and produce a 345 mph, four seat, pressurized aircraft that could be easily built in one’s home shop. Now, more than ten years later and after continual refinement, the Lancair IV has truly proven itself to be incredibly fast, efficient, safe, reliable, comfortable and now more than ever, easy to build. Over the years we have pioneered many "industry firsts" with this aircraft. To begin with, it is one of only four single engine piston aircraft in the history of aviation to achieve a pressurized cabin. The Lancair IV-P not only maintains an enviable 5.0 psi cabin differential, it has proven over the years to be very safe, reliable and extremely low in maintenance. Today, the vast majority of "IV" owners all around the world opt for the pressurized model. It is the ultimate compliment to cabin comfort and has helped to make the "IV-P" one of the world’s best personal cross-country machines. It truly combines airliner speeds and comfort with levels of freedom and economy never before possible (Lancair Web Site)