K&N | Performance Air Intake System - Focus / RS / Transit Connect / C30 / S40 2010-2018

K&N 57S-4000 – Performance Airbox | Ford Focus / RS / Transit Connect / Volvo C30 / S40

The K&N 57S-4000 performance airbox replaces the restrictive factory air filter and air box lid on Ford Focus ST, Focus RS, Transit Connect, and Volvo C30/S40. Designed to dramatically reduce airflow restriction, it includes an oversized high-flow conical filter and an injection-molded lid with the embossed K&N logo. The washable oiled cotton filter can be used up to 100,000 miles before servicing. Not street legal in California.

Specifications

• Part Number: 57S-4000
• Brand: K&N Engineering
• Compatible Engines: L4 1.6L Turbo, L4 2.0L Turbo, L4 2.3L Turbo, L5 2.5L Turbo
• System Type: Lid + replacement filter (factory air box retained)
• Filter Included: Washable red conical filter (E-9289)
• Filter Material: Oiled cotton gauze
• Filter Height: 7.688 in. (195mm)
• Mounting Hardware: Included
• Street Legal: No (not CARB exempt)
• Warranty: K&N Lifetime Limited Warranty

Note:

• FREE Delivery