I5 Cast Inlet Plenum [Mk2 Focus RS/ST] Power the route the oil vapour

the route the oil vapour takes on its way to the intake manifold has been significantly increased through the labyrinth design

without compromise

using genuine Ford parts and fluids

845 g/cm³ DIN 51757Viscosity at 40 °C: 83

I5 Cast Inlet Plenum [Mk2 Focus RS/ST] Power the route the oil vapourmountune's highly skilled engineers identified an obvious performance and aesthetical improvement to all I5 engines through the creation of an I5 cast inlet plenum. Extensive in house CAD and CFD work (by the same team responsible for producing mountune's BTCC, WTCC, WRC and Rallycross inlets) allowed an improvement to be made particularly around the port entrance to each inlet, as well as to increase the volume of the plenum itself to a more