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Ships within 48 hours · Estimated delivery Aug 6 - Aug 11
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Description
K&N BMW E90/91/93 335I N54 Engine Performance Air Intake SystemThe K&N Performance Airbox is designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. Replacing the restrictive factory air filter and air box allows your engine to inhale more air than with the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. A fully enclosed injection molded air box connects to the factory air intake hose. The removable lid
The K&N Performance Airbox is designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. Replacing the restrictive factory air filter and air box allows your engine to inhale more air than with the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. A fully enclosed injection molded air box connects to the factory air intake hose. The removable lid provides easy access to the filter when cleaning is required. This performance air box is relatively easy to install. The required tools are commonly available and it uses the previous air box space. These air box systems are built to last for the life of your vehicle and they're backed by K&N's No-Hassle Lifetime 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.Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.3 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Great value for the price.
Color: White, Size: X-Large
Great material and XL Sizing was generous.
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Reviewed in the United States on January 6, 2026
★★★★★ 5
Silky smooth fabric
This is a cool and comfortable polo shirt. It's made primarily of polyester with spandex as well to give it added stretch. It fits as expected in my regular size. The color and pattern appear like they did online. It falls somewhere in between casual and dressy and should be suitable for most settings. The fabric is smooth with a bit of sheen and feels cool to the touch. I've machine washed and dried it several times and it still looks great. I love that it doesn't wrinkle and I never need to iron it. Everything seems well put together and I think the quality is great.
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Nice breathable golf shirt
Color: Light Blue, Size: X-Large
Decent light weight golf shirt, and it does match the photo. The shirt is breathable, stretchy, and it fit as expected for the size.
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Reviewed in the United States on March 1, 2026
★★★★★ 5
This is THE BEST Polo-Style Shirt I Have EVER Seen!!
Color: Light Blue, Size: X-Large, Color: Light Blue, Size: X-Large
OH MAH GAWD this shirt is SO soft that I would call it slippery!! It fits PERFECTLY and true-to-size. The material is a lightweight 'satin' type feel to it that I have NEVER felt before!! Hubby just LOVES this shirt!! The color & print is just GORGEOUS with the subtle sleeve contrast at the 'cuff' (see pics)!! It is great quality with a style that will NEVER look "dated", since it is "Polo Reimagined" with the use of the slick-soft material! Given all of THAT... this is a GREAT value at this price!!
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Reviewed in the United States on January 7, 2026
★★★★★ 5
Highly Recommended Dress Shirt
Fit Type: Regular Fit, Color: White, Size: Medium
Honestly, I Love It. Fits Great, Neck Isn't Too Tight Like Most Shirts, And It's Comfortable. It Is 100% Cotton, So Dont Forget To Iron It Before Wearing It. High Quality Dress Shirt. Highly Recommended.
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Reviewed in the United States on October 21, 2025