an induction system for a supercharged internal v - type combustion engine includes a monolithic continuous unitary casting housing a supercharger with a rotor and gear assembly operative to discharge pressurized air to a common bounding receiving plenum , through a first slidably - removable intercooler providing a first cooling , and then to a pair of second side intercoolers providing a second cooling within the bounded plenum and in fluid communication therewith . first and second intercoolers are secured within the monolithic housing . the monolithic housing provides a robust and stable housing of light weight and allows an exterior air cooling as well . side walls of the supercharger are separate from and are spaced from air intake runners of a cylinder block . air in the plenum is additionally cooled by convective surface cooling while being guided in an appropriate direction . the intercoolers are plumbed in parallel allowing for enhanced temperature management of the air flow in combination with the convective cooling . the monolithic housing includes rib elements for sound attenuation and strength while minimizing weight . this arrangement allows for enhanced cooling , and simplifies manufacture and service .