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K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
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K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558

Air Intake Systems Air Intake Components
K&N Engineering
knn100-8558
Special order
September 4, 2026
Not CARB compliant. Not legal for sale or use in California on emissions-controlled vehicles.
$944.99
Light weight yet durable, K&N's Generation 2 Carbon Fiber Air Boxes are a must for any racer currently using traditional multi-Siamese stacks. Constructed from ultra-lightweight carbon fiber these filters provide ample air flow for your racing needs. They come with air horn seals to provide better sealing and easy installation. As with all K&N air filters, Generation 2 Carbon Fiber Air Boxes are washable and reusable. Simply use K&N cleaner and oil to service your filter. Features & Benefits Air horn seals are included for a tight seal and ease-of-installation Air Horn Seals Are Included For Tight Seal Downloads & Resources Link To Manufacturer Page User 8 (WEBM)
K&N Hose 3.25inid To 3inid X 2inl Tprd Reinforced - 08186
K&N Hose 3.25inid To 3inid X 2inl Tprd Reinforced - 08186
$32.99
K&N Velocity Stack Assembly - Red - 5-1/8in x 9in Dia 2-3/4in Flange - 58-1190
K&N Velocity Stack Assembly - Red - 5-1/8in x 9in Dia 2-3/4in Flange - 58-1190
$146.99
K&N Custom Racing Assembly Generation 2 Carbon Fiber Air Box - Large w/ 2.50in Air Horn - 100-8558
SKU: knn100-8558
Product Details

Everything You Need To Know

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

Product Info

Light weight yet durable, K&N's Generation 2 Carbon Fiber Air Boxes are a must for any racer currently using traditional multi-Siamese stacks. Constructed from ultra-lightweight carbon fiber these filters provide ample air flow for your racing needs. They come with air horn seals to provide better sealing and easy installation. As with all K&N air filters, Generation 2 Carbon Fiber Air Boxes are washable and reusable. Simply use K&N cleaner and oil to service your filter.

Features & Benefits

  • Air horn seals are included for a tight seal and ease-of-installation
  • Air Horn Seals Are Included For Tight Seal

Downloads & Resources

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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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