K&N COLD AIR INTAKE FILTER
Reviewed By Michael N (Portland, OR) Reviewed for a 2006 GMC Sierra —9/4/2014 8:46 PM
The filter collects dirt and debris inside the ribs making it impossible to clean. I decided to buy the filter sock which costed over $30. When I received the sock I felt like it wasn't worth the money. Looks like it could have been made for less than $5. I did notice a performance increase and improvements in the way the motor sounds.