I give the filter and the housing a 5. The issue ii had (which why I gave it 4 stars) was they sent 3 bolts to bolt up where the old air filter housing bolted. The only bolt location that lined up was the top bolt. I didn't feel comfortable only having 1 bolt holding it in place so I fabricated a lower bracket. It runs from the original mounting location from the bolt from the old air box side closest to the front of the car to the bottom hole in the new 42 Design air filter housing. Seems like the housing wasn't fabricated to be mounted up to my car but it's on and its sturdy now.