I just did the rear seat area, the muffler wells and up the rear axle wall to the x brace. I was interested in dreading the exhaust and amplification effect the area has. It wasn't that expensive, I used a quality jute carpeting and left the firewall alone completely. Wanted quieter drive, but it's a muscle and wanted a muscle car experience ... If I wanted a Camary I'd bought one, it would've been cheaper

Edit: grammar