


K&N Filter Universal Rubber Filter 3.75in Flange ID / 5.375in Base OD / 4.375in Top OD / 5in Height
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N Filter Universal Rubber Filter 3.75in Flange ID / 5.375in Base OD / 4.375in Top OD / 5in HeightSKU: RU 4250 UPC: 024844045164 K&N Filter Universal Rubber Filter 3. 75in Flange ID 5. 375in Base OD 4. 375in Top OD 5in Height K&N RU 4250 universal clamp on air filter fits racing vehicles radio controlled cars generators snowmobiles tractors and custom intakes regardless of angle or offset. Molded rubber flanges absorb vibration stretch up to 1 16 inch for secure fit. Washable reusable design traps contaminants while boosting airflow for more
Quick Dispatch:
Your K&N Filter Universal Rubber Filter 3.75in Flange ID / 5.375in Base OD / 4.375in Top OD / 5in Height orders ship within 1-2 business days.
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- Fast: 2-3 business days
- Express: 1-2 business days
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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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4.9 ★★★★★
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Product Reviews
★★★★★ 3
No me quedaron
Size: 8, Color: Dense Smoke
No son del # vienen más pequeños
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Super fun!
Size: 8.5, Color: Red Pepper
These are so fantastic! The color is amazing! It is a bit on the tomato-red side of the color-wheel. The fit is great. They are comfortable from the 1st step. Easy to walk in.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
★★★★★ 5
Look nice and super comfortable
Size: 9.5, Color: Sand
Very comfortable and go with everything! True to size and worth the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
★★★★★ 5
Comfortable
Size: 7, Color: Sand
Sharp cute trendy! Light weight, versatile
Excellent quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
★★★★★ 5
Footbed very soft and cushiony
Size: 9, Color: Sand
It was so comfortable even though it was a half size too small so i was able to exchange for a larger size. I originally ordered a size 9 and exchanged for a 9.5. I haven’t received the 9.5 yet but I am sure I am going to love them. They are so cute and go with everything.
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Reviewed in the United States on May 19, 2026
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