Review on Road Kill RKFR6 Speaker Enhancer by Savoeun Ramirez

Update: 08/05/2019 I just installed foam behind one of my front speakers and it KILLED bass and sound. Now it sounds duller. Use soundproofing instead. It was a waste of my money. Especially since I bought two sets for my two cars. I looked at the instructions on the bag and just looked at the pictures and figured you would glue the center piece directly to the back of the speaker. That is not right. I'll try to fix this later but it prevented me from installing them with my new speakers due to foam damage and adhesive loss during installation. Check YouTube for installation videos, it should be better. When replacing speakers, also bring speaker sealing tape with you. I'll use them later on another car, then install them properly and report back what I notice about them.