Featured product! Achieved the heavy, satisfying closing sound of a Benz, BMW, Lexus, etc., even on my kei truck! *Voom* → *Thump* For those who've made their doors hard to close by applying airtight seals! This won't make it hard to close! It seems the *thump* sound is created by the air escaping from the absorber through the grooves carved on the back! Easy installation, just stick it on, and the sound changes! You'll need two per door. For 4-door or 2-door cars, or if you want to apply them to the hood, rear gate, etc., the 8-piece set (sold separately) is a better deal! Unbranded, works with any manufacturer, and discreetly blends in with the original look! Seriously, the sound changes dramatically, so give it a try!