K&N X-Stream Top Assembly 7.313in Flange ID / 11in x 4.5in Custom Assembly - 66-3140 fits_2015-2020`BMW`4 Series They incorporate good looks as

They incorporate good looks as well as the superior air flow that you expect from K&N

These Sway-A-Way coilovers are designed to work with the factory rear control arms and allow for 11

Please select OEM front upper mount type

Aluminized DPF-Back Exhaust

s intake and rob the engine of power and efficiency

K&N X-Stream Top Assembly 7.313in Flange ID / 11in x 4.5in Custom Assembly - 66-3140 fits_2015-2020`BMW`4 Series They incorporate good looks asNot only does the K&N XStream add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency. Cleanable and reusable, the XStream Air Flow Top filter delivers the best protection available for your engine. Features & Benefits Washable and reusable Improves Air Flow Downloads & Resources Installation Instructions (PDF) Technical Bulletin (PDF) Link To Manufacturer