Originally Posted by
924RACR
Mixed results this past year with custom made earplugs. My car got insanely loud after some airbox rework at the beginning of last year, going from manageable with earplugs (though still almost impossible to understand digital radios at speed) to ear-damaging.
Even after installing a restrictor (mute) in the intake, at Mid-O I'm pretty sure I got tinnitis from the amount of noise making it past my custom-molded (from audiologist) radio earbuds. My earplugs, from the same source, seem to seal a bit better, may have prevented the damage... but only just barely, if at all. Just a tighter fit in the ear canal, it seems.