


K&N Universal X-Stream Clamp-On Round Air Filter 3.531in Flg ID/4in OD/5.969in H
Marsoni
M251S
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
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★★★★★ 5
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Perfect fit, easy to install worth the money.
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Reviewed in the United States on May 18, 2026
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Fits a 2008 Honda CRV.......
Simple product that works great. I think the vehicle is running much better since I replaced the filter.
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Reviewed in the United States on May 12, 2026
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