K&N Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H

K&N Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H

Marsoni

M251S

$167.99

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

K&N Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in HSKU: RX 4140 UPC: 024844043238 K&N Universal X Stream Clamp On Round Air Filter 3. 531in Flg ID 4in OD 5. 969in H The K&N RX 4140 universal X Stream clamp on air filter fits custom intake systems on racing vehicles and performance builds requiring a 3. 531 inch flange inside diameter. Its innovative top design increases filter media for greater airflow and dust protection in demanding conditions. This washable reusable filter ensures consistent engine

Easy Shipping

Quick Dispatch:

Your K&N Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H 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 Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H ships.

Need Help?
Questions about K&N Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H, 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 Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H in your area.

Get Shipping Estimates

Country Zip/Postal Code

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

As tweed Herringbone vests go, this is rather nice and fits well. I'm 5'10", medium build and the Large fit nicely. I ordered it to go with my Oktoberfest Lederhosen outfit (worn to Oktoberfest in Munich), and it worked well. It'll also work with jeans. It's not some high quality piece, but for the price, appears more expensive than what it costs.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 25, 2026

Verified Purchase

Will

Carnegie, US

★★★★★ 5

Nicely made

Size: XX-Large, Color: Burgundy

Good vest, nice material, good stitching, not too warm. I like it for over a button down shirt.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 21, 2026

Verified Purchase

Amazon Customer

Lake Worth, US

★★★★★ 4

Nice Qualtiy for the Money

Size: Large, Color: Light Blue

I originally ordered this vest in XL based on other reviewers' suggestions to up size, but I returned it for a large. Vests should fit snugly and not be loose. I'm 5"9" and 175lbs and the large was a good fit for me. The material is not as heavy as I expected based on the photos but it is not flimsy. It is well constructed with a nice liner. For the money it is a really nice item. I have nicer vests but then they cost several times what this one did. Overall, I am very happy with it.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 6, 2025

Verified Purchase

Kevin Abbott

Birmingham, US

★★★★★ 5

Great product

Size: Medium, Color: Gray

Fits well and looks great

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on June 23, 2025

Verified Purchase

Ron Kantrowitz

Houston, US

★★★★★ 3

Not terrible for the price. Not super high quality.

Size: 4X-Large, Color: Black

Not bad for the price. Fits a size smaller. I can wear it standing up, but need to unbutton it to sit down. I have very little faith in the buttons. The sewing looks rushed. I may cut them off and replace them. Brown buttons with a black vest? Odd choice. Not sure what the half moon pocket is for next to the button holes.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on November 6, 2025