The Quiet Pre-Filter over wrap for the AF-1 Air Filter Kit reduces the sound of the intake when accelerating.

It is constructed of Polyurethane Foam Filter media with 65 pores per inch and rated at 275°F.

If you like milder throttle sound the 1" thick Quiet Pre-Filter is your ticket.

Doc Riverside from Spyderlovers calls it the "Throttle Muffler".

The 2010-2012 RT has a cutout section to clear the frame, it's the lower photo.

Do Not put oil this filter!