- Product Details
Universal Clamp-On Pro Dry S Air Filter (21-40507) by aFeŽ, 4 F x 6 B x 4 D x 7 H. These universal air filters are designed to provide performance and protection. They feature extra-deep pleats and special pleat geometry to maximize airflow and integral velocity stacks to accelerate flow with minimal aerodynamic loss. The pliable flange with integrated bumps ensures a tight, no-leak seal.
Dimensions of the Available aFe Clamp-On Pro Dry S Air Filters:
Part # Flange Inside Dia. (F) Base Dia. (B) Top Dia. (D) Hight (H) 21-90031 2.5" 5" 4" 5" 21-90022 2.5" 6" 5.5" 5" 21-90029 2.75" 6" 4.75" 5" 21-28001 2.75" 6" 4.75" 5" 21-28003 2.75" 6" 4.75" 7" 21-90034 2.875" 5" 4" 5" 21-30003 3" 5" 3.5" 7" 21-30018 3" 6" 4.75" 7" 21-35005 3.5" 6" 4" 5" Click Here to Check Other Dimensions
- Increases airflow with superior air filtration/li>
- Improves performance
- Rounded pleats for better airflow
- 30% deeper pleats than comparable aftermarket filters
- Polyurethane construction withstands extreme engine temperatures
- Pro DRY S filter media
- Washable and reusable; no oiling required
- Extended service intervals
- Backed by a limited 2-year warranty
- Proudly made in the USA
aFe manufactures numerous sizes of these conical air filters for many applications. They feature the Pro DRY S filter media, and a full or modified integral velocity stack. The velocity stack increases the effective diameter of the intake tube; they flow more than standard filters but require a longer flange and wider filter base. The modified velocity stack allows for maximum airflow in limited base dimensions. They're used where space is a concern or where there is already a velocity stack at the filter tube transition.
The Pro DRY S filter media combines high airflow and filtration efficiency with the convenience of oil-free maintenance. It contains 2 layers of randomly porous synthetic fabric, which allows approximately twice the airflow when compared to a typical stock air filter. The increased airflow results in more horsepower and torque, better throttle response and more miles per gallon. But this improved airflow and performance hasn't been gained at the expense of engine protection. The Pro DRY S has an excellent 99.2% filtration efficiency rating.
The pleats are evenly spaced for greater dust holding capacity and the tips are rounded for better airflow. They're also 30% deeper than comparable aftermarket air filters for longer service intervals and greater dust holding capacity. The sealing surface and supporting structures are made from 100% polyurethane, to withstand extreme engine temperatures.
Under normal driving conditions the Pro DRY S won't need servicing for 25,000 to 30,000 miles. When service is required, the Pro DRY S can simply be washed and dried and put back into service; no oiling is necessary. The Pro DRY S can be washed and reused repeatedly; you'll never have to buy another air filter, ever. Universal clamp-on filters carry a 2-year limited warranty.51.00Brand: aFe Part Number: 21-40507 UPC: 802959210529
aFeŽ (Advanced Flow Engineering, Inc.) manufactures performance products for late model cars, light trucks and SUVs. The company was founded in 1999 with an initial concentration on high performance air filters. Since then, the company product line has broadened to include cold air intakes, fluid filters, exhaust systems, intake manifolds, intercoolers, programmers, differential covers, transmission pans and throttle body spacers. The team of engineers, machinists, production and sales people at aFeŽ have many years of experience in their respective positions, and together work to ensure they produce the best automotive products on the market.aFeŽ 21-40507 - Clamp-On Pro Dry S Air Filter Reviews (10)Customers' rating: 5 OF 5APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITY(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITYAFE PRO 5R Oil Filter| Posted by Timothy S. | 2013 Toyota Venza (Phoenix, AZ)
This filter increased my Toyota Venza's gas mileage up to 3 MPG on the highway. No increase in city driving. Fits perfectly and comes pre-oiled from the factory, so no first oiling!Was this review helpful for you? YesNo(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITY(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITY(4.5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITYAFE Pro DRY S Air Filter| Posted by Dennis I. | 2003 Ford F-350 (Lake Hughes, CA)
The installation was straight forward, just like installing the factory filter. Perfect fit, my truck seems to be more responsive. Can't say about fuel economy, don't know yet.Was this review helpful for you? YesNo(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITYAFE Pro Dry S Air Filter| Posted by David O. | 2011 Infiniti G37 (Austin, TX)
I ordered a pair of AFE Pro Dry air filters for my 2009 Infiniti G37. As soon as I compared the originals to the Pro Dry S I could see the quality is everything described about AFE Pro Dry filters. I just installed them so I don't know yet if I will get the improved performance from this filters, but not having to replace them is a great savings.Was this review helpful for you? YesNo(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITY(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITY(5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITY(4.5)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITYNice| Posted by Greg F. | 2004 Toyota Tundra (Point Roberts, WA)
Have been using this filter in my other truck. Impressed with the construction and quality. The gains can be debated, but serviceability and ease of use are great. These are easy to clean and last forever.Was this review helpful for you? YesNo(4)APPEARANCEEASE OF INSTALLATIONPRICE/VALUEQUALITYMore AccessoriesProduct ReviewsaFeŽ 21-40507 - Clamp-On Pro Dry S Air Filter Reviews (10)View more 10 All aFe Air Filters reviews >>