Step 1: The original air filter is a muffler?
Also in the third picture the highlighted area shows where the plastic was covering the air inlet. This was from super high quality Chinese manufacturing.
Step 2: The new air filter
Step 3: Tools needed step 1
First cut off the bottom bowl.
Step 4: Step 2 grinding and cutting
Also now you can use your exacto blade to remove the casting flaws that are blocking air flow. I highlighted the areas on mine that were clogged up with excess plastic.