K&N 33-2345 Engine Air Filter

Engine Air Filter Overview

K&N 33-2345 is a washable, reusable engine air filter built as a drop-in replacement for the factory air box. It uses layered, oiled cotton gauze media to improve airflow while capturing contaminants, and it is pre-oiled for installation.

Key Features

• Panel-style air filter with a flexible frame for factory air box fitment.
• Washable and reusable design for long service life.
• Layered cotton gauze media for high-flow filtration.
• Pre-oiled filter media for ready-to-install convenience.
• Low-profile 1 in. height with no flanges.

Detailed Description

The K&N 33-2345 replacement air filter is engineered for drivers who want a serviceable upgrade over a disposable paper element. Its panel shape and flexible frame are made for direct installation in the stock air box, while the cotton gauze media is designed to balance airflow and contaminant capture. This part number, 33-2345, is a practical choice for Lexus IS250, Lexus IS350, Lexus GS350, and Lexus GS430 applications listed in the fitment data.

K&N’s washable filter construction is intended for repeated cleaning and re-oiling, reducing the need for frequent replacement. The filter is pre-oiled from the factory, and the product is backed by K&N’s 10-Year/Million Mile Limited Warranty. This part cross-references NGK 49146 and Pronto PA5798 for the same application.

What It Is Used For

• Replacing a clogged or restricted factory engine air filter.
• Restoring intake airflow when the original filter is dirty or worn.
• Supporting routine maintenance on a reusable filtration setup.
• Addressing reduced filtration efficiency from a saturated paper element.
• Upgrading to a washable filter for long-term serviceability.

Installation Notes and Tips

Install 33-2345 in the factory air box as a direct replacement for the original panel filter. Verify the air box is clean before installation, and follow K&N cleaning and re-oiling procedures during future service intervals. Confirm fitment against the vehicle listing before ordering, especially for Lexus IS250, Lexus IS350, Lexus GS350, and Lexus GS430 applications.

Quality Assurance

K&N backs this filter with a 10-Year/Million Mile Limited Warranty. The reusable design, pre-oiled media, and factory-style drop-in format reflect K&N’s performance filtration approach for the 33-2345 replacement air filter.