Peace be upon you. (Honda Accord 2003 to 2007 only...) I have a modified antique box with a small hole for a slight increase in horsepower and a sporty sound. The box is original, used, and modified. The horsepower increase is about 1 to 3 depending on the engine and its cleanliness. It produces a strong sound when the pressure reaches 3 and above, similar to a sports filter. It installs directly without modification; just remove the old one and install this, along with the same filter and cover, all without modification. Note: There is a very small break in the base, but it won't affect anything; it installs normally. The asking price is 150, negotiable. My location is Mecca. ( Phone number appears when clicking the contact button )