K&N Custom Racing Assembly Carbon Fiber 4in Air Box w/ Base and Hardware - Large

K&N Custom Racing Assembly Carbon Fiber 4in Air Box w/ Base and Hardware - Large

Marsoni

M251S

$472.50

Get it in 3 business days with 1 day shipping. Friday, May 29

K&N Custom Racing Assembly Carbon Fiber 4in Air Box w/ Base and Hardware - LargeLight weight yet durable, K&N's Sprint Car Style Air Boxes are a must for any racer currently using traditional multi Siamese stacks. Constructed from ultra light weight carbon fiber K&N's Sprint Car Style air box provides ample air flow for your racing needs. As with all K&N filters, it is a washable and reusable air filter. Simply use K&N oil and cleaner to service your filter.

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Your K&N Custom Racing Assembly Carbon Fiber 4in Air Box w/ Base and Hardware - Large orders ship within 1-2 business days.

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

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You'll receive a tracking link by email once your K&N Custom Racing Assembly Carbon Fiber 4in Air Box w/ Base and Hardware - Large ships.

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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Can I give these more than five stars? Please?? They truly deserve more than that! I have bought these bones for the last 2 years for my pitbull mix, who is a very aggressive chewer. Her favorite thing to do is just lay and chew. These bones last FOREVER! She can lay there and chew all day long and they will last her MONTHS! It’s honestly amazing! These are the best bones we’ve ever given her and they are the only ones we’ll buy her! Not only do they last forever, they’re safe and natural too! Best product ever!

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Reviewed in the United States on January 10, 2026

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Dee

Los Angeles, US

★★★★★ 4

Great for aggressive chewers, but small mess

Size: Large (Pack of 1), Size: Large (Pack of 1)

He took it right away! It’s a great size. We’ll see how it holds up ONE MONTH UPDATE: (photo included) He loves it still! Still a bit messy but holding up great and he’s a aggressive chewer 1 WEEK UPDATE (photo update included) The bone is great. He loves it and it’s been holding up great. Our 8 month puppy is a super chewer and 60 lbs. the bone has signs of wear but nothing crazy. I went from 5 stars to 4 stars because whenever he chews the bone, the small tiny pieces of bone/wood go everywhere and they’re sticky/hard and make kind of a mess. But still would get this bone again and highly recommend

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Reviewed in the United States on December 16, 2025

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hellothere

Lexington, US

★★★★★ 5

Dog loves these

Size: X-Small (Pack of 1)

These are the best chew toys. They are reasonably priced and last a long while. Fast shipping.

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Reviewed in the United States on March 8, 2026

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Vanessa

Battle Creek, US

★★★★★ 5

Made for aggressive chewers

Size: Small (Pack of 1)

My aggressive chewers are obsessed. This is one of the only chew toys that actually lasts for them. Always have to buy 2 so they each have their own

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Reviewed in the United States on February 28, 2026

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Jessica

Louisville, US

★★★★★ 5

My dogs love these sticks!

Size: Large (Pack of 1)

My dogs love these sticks! We buy them constantly because they chews on them daily and must stash them all over the house.

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Reviewed in the United States on May 29, 2026