SKU: 33-2591 | UPC: 024844001306
K&N 33-2591 Replacement Air Filter for 1978-1995 Porsche 928
The K&N 33-2591 is a washable reusable drop-in air filter designed for 1978-1995 Porsche 928 models including Base S S4 GT and GTS variants. Its layered oiled cotton media allows more airflow for horsepower gains while trapping contaminants for engine protection. This direct factory replacement installs easily and lasts the life of your vehicle with K&N lifetime limited warranty.
Key Features
- 4 Layers of Protection: Multiple layers of premium cotton gauze with tacking agent form a mesh to block and trap dirt and contaminants
- Clean Once Every 5 Years: Service interval every 75000 miles under normal highway driving or 5 years at 15000 miles per year
- Easy Installation: Pre-oiled filter drops straight into factory air box for quick performance upgrade with no tools needed
- Engineered Power: High-flow media increases horsepower acceleration and overall engine performance
- Reusable Design Saves Money: One K&N filter replaces multiple disposables saving up to 125 dollars over 200000 miles versus OE filter MSRP
Product Notes
- Pre-oiled and ready for immediate drop-in installation
- Wash with K&N cleaning kit and re-oil for maintenance every 75000 miles
- Weight 1 lb shipping box dimensions 8.25 x 7.5 x 2.75 inches
Installation Notes
- Professional installation recommended.
- Remove stock filter and drop K&N 33-2591 into existing air box
- Compatible with factory air box no modifications or hardware required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1978-1982 | Porsche | 928 | Base |
| 1990-1991 | Porsche | 928 | Base |
| 1990-1991 | Porsche | 928 | GT |
| 1993-1995 | Porsche | 928 | GTS |
| 1983-1986 | Porsche | 928 | S |
| 1987-1989 | Porsche | 928 | S4 |
Why Choose K&N?
- Decades of engineering high-performance air filters for automotive enthusiasts
- Durable construction with premium materials built to last vehicle lifetime
- Backed by No-Hassle Lifetime Limited Warranty for stock replacements
Frequently Asked Questions
-
Q: Does the K&N 33-2591 fit all 1978-1995 Porsche 928 models?
A: Yes it fits Base (1978-1982 1990-1991) GT (1990-1991) GTS (1993-1995) S (1983-1986) and S4 (1987-1989) with 4.5L to 5.4L engines -
Q: What material is used in this air filter?
A: Four layers of oiled premium cotton gauze media with centered rubber flange filter dimensions 6.75 inch OD 5.5 inch ID 1.563 inch height -
Q: What is the warranty and cleaning process?
A: No-Hassle Lifetime Limited Warranty covers defects wash with K&N kit every 75000 miles re-oil and reinstall
Shipping &. Handling
- Method: Ground shipping via UPS or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Secure cardboard box 8.25 x 7.5 x 2.75 inches
- Weight: 1 lb
Air Filters
Welcome to our collection of high-quality Air Filters, designed to enhance the air quality in your home or office. Our carefully curated selection features a variety of air filters suitable for different needs, ensuring you breathe easy in any environment. Whether you are looking for HEPA filters, activated carbon filters, or specialty filters, you will find the perfect solution to keep your space fresh and clean. Why Choose Our Air Filters? Our Air Filters provide exceptional performance and durability. Here are some key benefits: Enhanced Air Quality: Removes dust, allergens, and pollutants, promoting a healthier atmosphere. Energy Efficiency: Designed to optimize airflow, reducing energy costs while maintaining effectiveness. Variety of Options: Available in various sizes and types to fit most HVAC systems and air purifiers. Shop with Confidence All our Air Filters are sourced from trusted manufacturers, ensuring you receive reliable products that meet strict quality ...
View Air Filters Products
Air Filters - Drop In
Welcome to our exclusive Air Filters - Drop In collection, designed to enhance your indoor air quality effortlessly. Our curated selection features high-performance drop-in air filters that are perfect for both residential and commercial use. These filters are engineered to capture dust, allergens, and airborne particles, ensuring that you breathe cleaner, healthier air. Why Choose Our Drop In Air Filters? Easy Installation: Our drop-in design makes it simple to replace your existing filters without any hassle. Superior Filtration: Each filter is crafted to provide maximum airflow while effectively trapping contaminants. Durability: Made with high-quality materials, our filters are built to last and maintain performance for extended periods. Benefits of Using Air Filters - Drop In Investing in our Air Filters - Drop In ensures that you are taking proactive steps toward a healthier living environment. Regular replacement of air filters can significantly reduce allergens and othe...
View Air Filters - Drop In Products
K&N Engineering
Cold Air Intakes, Air Filters, Oil Filters & Performance Filtration Browse premium K&N Engineering performance parts and filters at Black Ops Auto Works, including cold air intakes, replacement air filters, universal air filters, oil filters, cabin air filters, fuel filters, filter cleaning kits, air intake accessories, and performance filtration upgrades for cars, trucks, SUVs, diesel applications, off-road vehicles, and performance builds. K&N is one of the most recognized names in automotive filtration and airflow technology, trusted by enthusiasts who want better airflow, reusable filter performance, and dependable engine protection. Why Choose K&N Engineering K&N products are engineered to improve airflow and support performance-focused driving across street, towing, off-road, and high-performance applications. Popular reasons drivers choose K&N include: Improved airflow and throttle response Reusable, washable air filters Long-term filtration value Veh...
View K&N Engineering Products
Porsche Parts & Accessories
Shop Performance Parts & Aftermarket Accessories for your Porsche Upgrade your vehicle with premium Porsche performance parts and aftermarket accessories from Black Ops Auto Works. This collection features high-quality Porsche exhaust systems, suspension upgrades, brake kits, intake systems, carbon fiber parts, and engine performance components designed to improve horsepower, handling, and overall driving performance. Whether you drive a Porsche 911, Cayman, Boxster, Macan, or Cayenne, our catalog is built for enthusiasts who demand precision engineering, OEM+ fitment, and track-ready performance. Porsche Parts from Top Performance Brands Shop industry-leading brands specializing in Porsche aftermarket performance parts, including: Fabspeed Motorsport exhaust systems, headers, and sport cats Akrapovič titanium exhaust systems Bilstein shocks, struts, and suspension kits KW Suspension and Öhlins coilover systems Eibach performance springs and suspension components APR Performanc...
View Porsche Parts & Accessories Products


