SKU: 15920608399

aFe QUANTUM Intake Replacement Air Filter w/ Pro DRY S Media (21-91129)

Sale price$82.94 Regular price$92.15
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Description

aFe QUANTUM Intake Replacement Air Filter w/ Pro DRY S Media (21-91129)Quantum Pro Dry S Oval Tapered Gray Air Filter (21 91129) by aFe. Quantum Pro DRY S air filter by aFe Power is specifically designed for the Quantum Series cold air intake systems and feature an injection molded base and top for lighter weight and rigidity. The newly designed base includes a built in, 3 angle velocity stack for smooth, even airflow. The Quantum Pro DRY S filter is a 360 degree radial flow air filter with oil free, 3 layer

Quantum Pro Dry S Oval Tapered Gray Air Filter (21-91129) by aFe. Quantum Pro DRY S air filter by aFe Power is specifically designed for the Quantum Series cold air intake systems and feature an injection molded base and top for lighter weight and rigidity. The newly designed base includes a built-in, 3-angle velocity stack for smooth, even airflow. The Quantum Pro DRY S filter is a 360-degree radial flow air filter with oil-free, 3-layer progressively finer porosity synthetic media for optimum flow, filtration and convenience. Captive screws are included to eliminate lost hardware and to securely fasten to the Quantum Intake system housing.

Oil impregnated air filters offer great performance and extended service intervals, but when service is required they can be time consuming, waiting for the filter to dry after cleaning and then applying the oil. So if minutes are precious to you there's a performance air filter for you, the Pro DRY S. The Pro DRY S was developed specifically to provide increased airflow and excellent filtration efficiency, in a filter package that could be washed and put back into service in a minimal amount of time.

The Pro DRY S filter contains 2 layers of randomly porous synthetic fabric. This 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 in the Pro DRY S 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 structure of the Pro DRY S are made from 100% polyurethane, to withstand extreme engine temperatures. Flat panel filters are constructed with 4 sides, not just 2, for added rigidity and seal support, and feature a progressive bump seal to ensure an airtight seal.

Under normal driving conditions the Pro DRY S won't need servicing for 25,000 to 30,000 miles. Since a typical OEM paper element should be replaced every 15,000 miles, the Pro DRY S will pay for itself before the first service is required. And when service is required, the Pro DRY S can simply be washed and dried and put back into service; no oiling is necessary. The synthetic filter media dries in far less time than cotton gauze so your downtime will be kept to a minimum. The Pro DRY S can be washed and reused repeatedly; you'll never have to buy another air filter, ever.

Direct factory replacement Pro DRY S air filters are backed by a limited lifetime warranty. Universal clamp on filters have a 2-year warranty while racing filters have a 1-year warranty.

aFe (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 aFe have many years of experience in their respective positions, and together work to ensure they produce the best automotive products on the market.

Features:

  • Unique Filter-To-Housing Integrated Design
  • Injection Molded Top and Base For Long Lasting Rigidity
  • Lighter In Weight
  • Securely Fastens To Housing w/4 Captive Screws
  • Built In 3 Angle Velocity Stack For Smooth Even Airflow
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15920608399

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Alanna Humphrey
Grantham, US
★★★★★ 4
Runs small. Get a size up.
Size: Large, Color: Organic Cotton 5 Pack-bwg
Runs a bit small. Kind of tight. Size up.
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Reviewed in the United States on February 26, 2026
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Amelia Bradley
Los Angeles, US
★★★★★ 3
Elastic band is not great
Size: X-Large, Color: Organic Cotton 5 Black Pack
The cotton material is comfortable and seems like it will last some time because it isn't thin like most. However, I could really use a thicker, more durable elastic band.
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Reviewed in the United States on November 29, 2025
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doctur44
Massapequa, US
★★★★★ 5
Comfortable
Size: Large, Color: Organic Cotton 5 Black Pack
Comfortable and decent looking black underwear in a hipster, boy cut style. Material is soft and lightweight, kind of thin, but since they’re black they’re not see through at all. The elastic band at waist is also thin and not too tight so it’s very comfortable and doesn’t dig in at all. Five identical pairs in the order makes this a decent value, especially at this price and for Organic cotton material. The large size was perfect for me I sized up based on the recommendations). I’m pretty happy with this order.
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Reviewed in the United States on October 17, 2024
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R. Staley
Carnegie, US
★★★★★ 5
Comfortable, great coverage, perfect fit!
Size: Medium, Color: Organic Cotton 5 Black Pack
These boy shorts are the perfect cut and extremely comfortable! They were true to size, great coverage and they fit me great. They stay in place and don't ride up in my pants so that was a huge plus too. Really glad these came in a pack of multiples cause I would definitely want more. I actually might order more anyways cause I like them so much, haha! Definitely recommend these, they are a great price for comfortable, nice quality underwear.
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Reviewed in the United States on October 4, 2024
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B. T.
Lexington, US
★★★★★ 5
Black Undies
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