33-2227 is a 33-series original position flat-type high-performance air filter. It is specially designed for 2003-2007 models of Honda Accord (2.4L inline four-cylinder, 3.0L V6 engine), 2006-2008 models of Honda Ridgeline (3.5L V6 engine), etc. It can directly fit into the original air filter box without any additional modification. It is suitable for urban commuting, highway driving and household use, and is compatible with the original ECU and emission system.