Skip to content

K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn

Marsoni M251S
Sale price$472.50
Pay 4 payments of $118.12 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air HornLight 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
Easy Shipping

Quick Dispatch:

Your K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn ships.

Need Help?
Questions about K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn in your area.

Get Shipping Estimates

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
4.7 ★★★★★
Based on 249 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
N
Verified Purchase
Norma Torres
Natrona Heights, US
★★★★★ 5
Very nice
This sets is good, the size is perfect,very well made not that cheap plastic. It looks great in my bathroom and color matches great with my shower curtain and rugs. I wonder if they come in other colors.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
B
Verified Purchase
ben johnson
San Leandro, US
★★★★★ 3
Cheap plastic
Size: 7 Pcs Bathroom Set, Color: Grey
Was what I ordered,but the handle for the toilet brush broke on second use. Dollar store brushes are better than this one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
C
Verified Purchase
Chillicothe30
Whiting, US
★★★★★ 5
Cost
Size: 7 Pcs Bathroom Set, Color: Green
Very nice
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
N
Verified Purchase
Néstor ramirez
New York, US
★★★★★ 5
Recomendado
Muy bueno lo recomiendo le doy 5 estrellas
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
L
Verified Purchase
Lianaf
Chelsea, US
★★★★★ 5
Excellent..
Size: 7 Pcs Bathroom Set, Color: Green
Excellent..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 27, 2025

recommand products