K&N Engineering Performance Intake Kit

Fits 1991–1995 BMW 325i with 2.5L L6 engine

Part #: 57I-1001

Overview

The K&N Performance Intake Kit is designed to enhance the airflow to your BMW 325i's engine, helping to unlock additional horsepower and torque. Crafted for enthusiasts seeking improved engine response and efficiency, this intake system combines high-quality materials with a precision design to support your vehicle’s performance goals. Whether you're upgrading for better throttle response or increased power, this kit offers a reliable and durable solution that complements your vehicle’s engineering. This intake kit is ideal for drivers who want to maximize their BMW’s airflow capacity while maintaining a high level of durability and ease of maintenance. Its thoughtful design ensures a seamless fit and straightforward installation, making it suitable for both seasoned mechanics and DIY enthusiasts.

Key Features

Designed with performance and longevity in mind, this intake system features a high-density polyethylene (HDPE) rotationally molded tube that increases airflow volume and resists heat transfer. The oversized, conical High-Flow Air Filter™ with oiled cotton media provides excellent filtration and can go up to 100,000 miles between services under normal highway conditions. The custom heat shield helps protect intake air from engine bay heat, ensuring cooler, denser air reaches your engine for optimal combustion. The kit is engineered for a straightforward installation process, with all necessary components included to upgrade your intake system efficiently.

Construction & Design

The intake tube is made from durable HDPE, which offers excellent resistance to heat and physical impact. The rotational molding process ensures a seamless, precise fit that maintains structural integrity under demanding driving conditions. The oversized conical filter is designed for maximum airflow and filtration efficiency, while the heat shield is custom-molded to fit your vehicle’s engine bay, helping to keep intake air cooler and more consistent.

Driving Feel & Feedback

This intake kit helps improve throttle response and engine sound, providing a more engaging driving experience. The increased airflow supports better combustion efficiency, which can translate into noticeable improvements in acceleration and overall engine responsiveness. The system is designed to deliver a balanced blend of performance and reliability, enhancing your driving enjoyment without compromising engine safety.

Installation & Fitment

The kit is engineered for a direct bolt-on installation, with all necessary hardware included. It is compatible with BMW 325i models from 1991 to 1995 equipped with a 2.5L, 24-valve inline-six engine. The installation process typically requires basic hand tools and can be completed in a few hours, making it accessible for DIY enthusiasts and professional installers alike.

What’s Included

The package includes the high-density polyethylene intake tube, washable High-Flow Air Filter™, custom heat shield, and all necessary mounting hardware for a complete upgrade.