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K&N 04-10 Opel Astra H 2.0L F/l 57i Series Performance Intake Kit - 57S-4900
K&N 04-10 Opel Astra H 2.0L F/l 57i Series Performance Intake Kit - 57S-4900
K&N 04-10 Opel Astra H 2.0L F/l 57i Series Performance Intake Kit - 57S-4900
K&N 04-10 Opel Astra H 2.0L F/l 57i Series Performance Intake Kit - 57S-4900
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K&N 04-10 Opel Astra H 2.0L F/l 57i Series Performance Intake Kit - 57S-4900

Air Intake Systems Cold Air Intakes
K&N Engineering
knn57S-4900
Special order
September 11, 2026
Not CARB compliant. Not legal for sale or use in California on emissions-controlled vehicles.
$159.99
The K&N 57S-4900 Performance Airbox replaces the restrictive factory air filter and air box. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The 57S-4900 Performance Airbox comes with a custom shaped K&N high-flow air filter and a fully enclosed injection molded air box that connects up to the factory air intake hose. The air box has a removable lid for easy access to the filter when cleaning is required. The air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This performance air box is relatively easy to install into the previous air box space with commonly available tools. K&N builds these air box systems to last for the life of your vehicle and they are backed by K&N's Million Mile Limited Warranty. Some K&N 57S Series Performance Airboxes are compliant with the latest TUV emissions and sound regulations. Check the K&N catalog or website for vehicle applications and specific...
K&N 2015-2016 Ford Expedition/15-16 Lincoln Navigator 3.5L V6 F/I Performance Intake Kit - 57-2595
K&N 2015-2016 Ford Expedition/15-16 Lincoln Navigator 3.5L V6 F/I Performance Intake Kit - 57-2595
$317.99
K&N 2015 Ford Mustang L4-2.3L 57 Series FIPK Performance Intake Kit - 57-2589
K&N 2015 Ford Mustang L4-2.3L 57 Series FIPK Performance Intake Kit - 57-2589
$317.99
K&N 04-10 Opel Astra H 2.0L F/l 57i Series Performance Intake Kit - 57S-4900
SKU: knn57S-4900
Product Details

Everything You Need To Know

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

Product Info

The K&N 57S-4900 Performance Airbox replaces the restrictive factory air filter and air box. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The 57S-4900 Performance Airbox comes with a custom shaped K&N high-flow air filter and a fully enclosed injection molded air box that connects up to the factory air intake hose. The air box has a removable lid for easy access to the filter when cleaning is required. The air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This performance air box is relatively easy to install into the previous air box space with commonly available tools. K&N builds these air box systems to last for the life of your vehicle and they are backed by K&N's Million Mile Limited Warranty. Some K&N 57S Series Performance Airboxes are compliant with the latest TUV emissions and sound regulations. Check the K&N catalog or website for vehicle applications and specific TUV status for each vehicle and air intake.

Features & Benefits

  • K&N Million Mile Limited Warranty

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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.

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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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