A piston for a direct injection engine is provided, the piston having a bowl at an upper end, the bowl forming a portion of a combustion chamber. The front entry door assembly is disposed in the front portion of the sidewall of the bus that is inwardly tapered to provide easy access into the interior of the bus through the opened panels by a wheel-chair bound passenger. The extraction approach can be taken for Islands, Nets, as well as other granularities within the design. The recesses may each be defined by a first extension, a second extension, and an end wall.