K&N Round Air Filter 14in OD / 12in ID / 2.313in Height Splash guards A high-density polyethylene (HDPE) rotationally

A high-density polyethylene (HDPE) rotationally molded tube helps increase the volume of airflow by 61

4L V8 AT 4DR 3

2004 BMW 325i 2

Choose from 2 unique tip options: Side exit twin Pro Series tips and straight-cut single tips

Our 2-way adjustable front sway bar allows the driver to dial in the front roll resistance to achieve the desired handling bias

K&N Round Air Filter 14in OD / 12in ID / 2.313in Height Splash guards A high-density polyethylene (HDPE) rotationallyThe K&N E 3740 replacement air filter is designed to increase horsepower and acceleration by reducing restriction and increasing air flow to your engine. The E 3740 is made with oiled layers of woven cotton that offer superior filtration and can be washed and reused repeatedly. K&N replacement air filters can go up to 50,000 miles before cleaning is required, depending on driving conditions. One K&N replacement air filter costs less than replacing