Air and Fuel› Air Cleaners, Filters, Intakes and Components

K&N

Performance Air Intake System

$262.99

SKU: 57-0691

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The K&N 57i Series International Kit is a performance air intake system designed to increase engine airflow. It features a roto-molded High-Density Polyethylene (HDPE) intake tube and a washable, reusable High-Flow Air Filter with oiled cotton media. This system replaces the factory air filter and intake tube, and includes all necessary mounting hardware.
Show original supplier description
The K&N 57i Series Generation II performance air intake system is engineered to boost your BMW's performance by increasing airflow to the engine. This intake system pairs a roto-molded HDPE tube with an oversized, conical oiled cotton air filter. The K&N High-Flow Air Filter™ provides exceptional filtration and requires cleaning only every 100,000 miles under normal highway driving conditions. A custom heat shield is included to help insulate the intake air from the high temperatures within the engine bay, ensuring optimal performance. Designed as a direct replacement for the factory air filter and intake tube, the K&N 57-0691 typically installs in 60 minutes or less using simple hand tools. This system is compatible with 2011-2017 BMW 520i and 528i models. Some K&N intakes are not legal for sale or use on pollution-controlled motor vehicles in California; always check specific product specifications for CARB status for your vehicle. The K&N 57-0691 comes with K&N's No-Hassle Lifetime Limited Warranty.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandK&N
Part Number57-0691
CategoryAir and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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