K&N Engineering E-3740 Replacement Round Air Filter for Peugeot 604

The K&N E-3740 replacement air filter is designed to increase horsepower and acceleration by reducing restriction and increasing air flow to your engine. The E-3740 is made with oiled layers of woven cotton that offer superior filtration and can be washed and reused repeatedly. K&N replacement air filters can go up to 50,000 miles before cleaning is required, depending on driving conditions. One K&N replacement air filter costs less than replacing disposable air filters over and over again. The E-3740 is simple to install and is custom designed to fit right into the factory air box of older Ford Scorpio and Peugeot models, as well as other applications. K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. Stock replacement air filters for street vehicles are covered by K&N's Million-Mile Limited Warranty. Associated products: E-3740PL Air Filter Wrap, 99-5000 Filter Care Service Kit Aerosol

• Million Mile Limited Warranty®
• Million Mile Limited Warranty

The K&N Engineering E-3740 replacement air filter is designed to improve engine airflow, horsepower, and acceleration by reducing intake restriction. Its washable, reusable construction uses multiple layers of oiled woven cotton media to provide efficient filtration while supporting consistent airflow. Designed as a replacement for the factory air filter, the E-3740 installs into the original air box for a straightforward upgrade without extensive modifications.

Unlike disposable filters that require frequent replacement, the K&N Engineering E-3740 can be cleaned and reused repeatedly. Under normal driving conditions, service intervals may extend up to 50,000 miles, depending on vehicle use and environmental conditions. This reusable design can help reduce long-term replacement waste while maintaining dependable filtration for street-driven vehicles. The filter is also backed by K&N's Million-Mile Limited Warranty.

Fitment includes the 1979 and 1980 Peugeot 604. Always verify the original filter configuration and application details before installation. The E-3740 may also fit select older Ford Scorpio and Peugeot applications when matched against the vehicle's factory air box and filter requirements. Optional associated products include the E-3740PL Air Filter Wrap and the 99-5000 Filter Care Service Kit Aerosol. This product is intended for automotive applications and is not CARB-approved.

What's Included

• One K&N Engineering E-3740 washable replacement air filter
• Installation-ready replacement filter for the factory air box
• K&N Million-Mile Limited Warranty coverage

Key Product Specifications and Technical Data

• Brand: K&N Engineering
• Part Number: E-3740
• Product Type: Replacement automotive air filter
• Filter Style: Round panel-style air filter
• Filter Media: Oiled woven cotton
• Maintenance: Washable and reusable
• Service Interval: Up to 50,000 miles, depending on driving conditions
• Application: Factory air-box replacement

Features:

• Improved Airflow: Reduces intake restriction to support increased airflow, horsepower, and acceleration.
• Washable and Reusable: Oiled woven cotton filter media can be cleaned and reused repeatedly.
• Long Service Interval: May remain in service for up to 50,000 miles before cleaning, depending on driving conditions.
• Factory-Fit Replacement: Designed for simple installation in the original air box on compatible applications.

Fitments:
1979 Peugeot 604 Base
1980 Peugeot 604 SL

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1