Mountune RS airbox: Focus RS 2.5
 
The Mountune RS airbox has been uniquely designed and tested to meet original equipment standards, and is the only one of its type that will not affect your manufacturers’ warranty. Independent testing showed up to 17% less pressure loss than the standard Ford part, equating to more than enough airflow for 350PS, as demonstrated on the Mountune Focus RS MP350, MR375 and Ford Focus RS500. The kit includes: improved-flow inlet spout, increased-capacity airbox upper, Mountune Performance badge, fitting instructions and warranty document.
Application:
Ford Focus Mk2 RS 2.5 2009-2010
Ford Focus Mk2 RS500 2.5 2010
 
FRS2AIRBOX