SKU: 85537094694

Airaid U-Build-It - Silicone Coupler 4in. ID x 5-11/32in. x 2-29/32in. L. (Oval) 9231

$38.69 $42.99
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Description

Airaid U-Build-It - Silicone Coupler 4in. ID x 5-11/32in. x 2-29/32in. L. (Oval) 9231AIR U Build It Kit CTO The AIRAID Silicone Reducer Coupler connects two air intake tubes of different diameters. Use of this component with other AIRAID couplers, tubes and related U Build It components allows you to design your very own custom performance air intake system. COUPLER; OVAL 4in. ID X 5 11 32in. X 2 29 32in. L

AIR U-Build-It Kit

CTO

The AIRAID Silicone Reducer Coupler connects two air intake tubes of different diameters. Use of this component with other AIRAID couplers, tubes and related U-Build-It components allows you to design your very own custom performance air intake system.

COUPLER; OVAL 4in.ID X 5-11/32in. X 2-29/32in.L

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SKU: 85537094694

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4.1 ★★★★★
Based on 813 reviews
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Product Reviews
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Verified Purchase
Dmytro Sushynskyi
Lexington, US
★★★★★ 5
Great filter!
Excellent filter! Fits my 2017 BMW X5 f15. Eliminates all external odors from the street.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025
S
Verified Purchase
Shahida M Parveen
Carnegie, US
★★★★★ 4
Fits bmw x5 35i 2015
Installation was pretty easy. Works as designed. Will update.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 16, 2023
M
Verified Purchase
MLG
Los Angeles, US
★★★★★ 5
Great price
I love Mann filters. Great for the price and great quality. I was surprised how cheap they were ( my car takes 2 filters and two come in the box). They fit like a glove and now I am enjoying fresh air
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
E
Verified Purchase
Erik Pontes
Cuba, US
★★★★★ 5
Can’t beat MANN quality
Bought to replace the filters on my 2015 bmw x5 as there was a musty smell from ac. Old filters were another junk company that fit very loosely. I was impressed by the quality and how secure the MANN filters locked into the housing; musty smell all gone now! Easy 10min replacement job, comes with VERY detailed instructions for the less mechanically inclined
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2024
K
Verified Purchase
Kody A.
Cuba, US
★★★★★ 5
Great product
Fits our 2012 X5d perfectly. Do yourself a favor and youtube the process for replacing these. You'll see it's well worth doing yourself rather than paying a shop that charges a BMW premium on everything. Also something I learned recently... this is a low cost high charge item at the mechanic. A lot of times when they suggest replacing these it's because they just tick the box and don't actually look at them. We had our mechanic admit this on a recent service where it was suggested to replace, when we had just done it ourselves in April.
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Reviewed in the United States on July 23, 2023

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