Casite by Hastings. Run for 5000 miles on a 2007 TSX with 120000 miles. ADBV was still flexible but it doesn't bounce back like a silicon ADBV when bent in half. Louvers are perfect! The way these are designed are easily the best in the biz. Media was rough, very brittle. The bypass valve looked like an interesting design that I've never seen before.
