I5 Cast Inlet Plenum [Mk2 Focus RS/ST] mudflaps Using spark plugs that are

Using spark plugs that are optimised for increased power ensures maximum performance

Race-proven round wire locks

With an IS38 turbocharger installed

this also means the engine movement is considerable and this translates as unwanted wheel hop /  tramping - which is unpleasant and detrimental to your car's overall performance

As used in all of our entry-level performance upgrade kits for the Mk7 Fiesta

I5 Cast Inlet Plenum [Mk2 Focus RS/ST] mudflaps Using spark plugs that aremountune'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