Mountune Focus ST Cast Inlet Plenum

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Mountune Focus ST Cast Inlet Plenum

The highly-skilled engineers at Mountune identified an obvious performance and aesthetical improvement to all I5 engine’s through the creation of a cast inlet plenum.

Extensive CAD and CFD work 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 appropriate size for the 2.5-litre engine.

The inlet comes supplied with the required hardware for installation; fitting takes approx 90 minutes on the Focus ST due to the need to remove the standard induction assembly.

Substantial performance gains can be expected on all I5 engines - some example graphs can be seen here showing the typical improvement to a Mountune Focus ST MP260.

Output improvements will vary on non-Mountune upgraded vehicles dependent on specification of tune, calibration and boost level being run.