It improves air flow during intake.
Compatible models:
DIAVEL 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
DIAVEL AMG SE 2013
DIAVEL CARBON 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
DIAVEL CROMO 2013
DIAVEL STRADA 2013, 2014