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K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
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K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209

Air Filters Air Filters - Drop In
K&N Engineering
knn33-2209
In stock
$68.99
K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product! Features & Benefits CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles) Million Mile Limited Warranty Downloads & Resources Technical Bulletin (PDF) Link To Manufacturer Page
K&N Universal Chrome Filter 4 inch FLG / 5 3/8 inch Bottom / 4 1/2 inch Top / 8 inch Height - RC-4580
K&N Universal Chrome Filter 4 inch FLG / 5 3/8 inch Bottom / 4 1/2 inch Top / 8 inch Height - RC-4580
$83.99
K&N 05-06 Porsche Boxster 2.7L-F6/3.2L-F6 Drop In Air Filter - E-2295
K&N 05-06 Porsche Boxster 2.7L-F6/3.2L-F6 Drop In Air Filter - E-2295
$67.19
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter - 33-2209
Product Details

Everything You Need To Know

Review product information, shipping and returns, and price-match details before you order.

Product Info

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!

Features & Benefits

  • CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles)
  • Million Mile Limited Warranty

Downloads & Resources

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Shipping on new purchases

In Stock Items:
In stock items typically ship within 1-3 business days. Most items arrive within 2 business days, but there are situations where it may take up to 5 business days.

Special Order Items:
Special order and out of stock items are product-specific and lead times can vary. Please e-mail us if you are looking for an ETA / Lead Time on a specific product. Special order orders are subject to cancellation if the vendor cannot provide any ETA.

Returns Policy

To start the return process, please e-mail sales@allianceracing.com

Include the following:
Subject "Return for Order#"
Order Number
Part Number
Reason

Returns are eligible for up to 14 days from delivery of items. Accepted refunds can take up to 7-10 business days to process. All refunds are subject to a 25% restocking fee, if opened. Customer may be responsible for return shipping. If 14 days have gone by since your item was delivered, unfortunately we can’t guarantee you a refund or exchange. We reserve the right to deny any return request, based on provided information.

Alliance Racing is not responsible for ensuring part fitment. It is the responsibility of the purchaser to ensure the parts being ordered are the correct fitment for the vehicle intended. Alliance Racing will not accept any returns for incorrect fitment after product is opened.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Shipping

To return your product, mail your product to:
Alliance Racing LLC
8810 Twin Lakes Blvd
Tampa, FL 33614

In many cases, you will be responsible for shipping costs to return your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping will be deducted from your refund.

Depending on your location, the time it may take for your exchanged product to reach you may vary.

If you are shipping an item over $100, you should consider using a trackable shipping service and/or purchasing Shipping Insurance.

To initiate a price match, please e-mail sales@allianceracing.com with the product information (SKU, URL, & Part Name) and a link to the competitors product page for us to validate the price match eligibility.

Please note that there are cases when we cannot offer a price match, but we will do everything in our power to try to match it. Some manufacturers have Pricing Policies that we have to adhere to.

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