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K&N Filter Universal Rubber Oval Straight 4.5in OL x 3.75in OW x 7in Height 20 Degree Angle

Marsoni M251S
Sale price$55.19
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K&N Filter Universal Rubber Oval Straight 4.5in OL x 3.75in OW x 7in Height 20 Degree AngleSKU: RU 1390 UPC: 024844010179 K&N Filter Universal Rubber Oval Straight 4. 5in OL x 3. 75in OW x 7in Height 20 Degree Angle K&N RU 1390 delivers high airflow for racing vehicles radio controlled cars generators snowmobiles tractors and custom intakes. This oval straight filter features a 20 degree angle rubber flange 4. 5in outside length x 3. 75in outside width 7in height flange inside 4. 125in length x 3. 375in width and 0. 75in flange length.
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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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4.3 ★★★★★
Based on 849 reviews
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Product Reviews
J
Verified Purchase
j lopez
Omaha, US
★★★★★ 5
Car part
Exact fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 19, 2026
J
J. Jenkins
Waukegan, US
★★★★★ 5
Perfect Fit for Full Cooling System Overhaul on BMW 330xi
I ordered this Engine Coolant Hose (part #11537545890) for my 2006 BMW 330xi as part of a comprehensive cooling system overhaul. Along with this hose, I had my mechanic replace the thermostat, water pump, radiator, expansion tank, and all other related hoses. This hose fit exactly as expected—no issues during installation. It’s been three weeks since the job was completed, and everything is performing flawlessly. No leaks, no warning lights, and the engine temperature remains stable under all driving conditions. Although this is not a genuine OEM part, the quality appears solid and it matched up perfectly with the original in terms of length, shape, and connector alignment. For anyone looking to refresh their aging BMW’s cooling system, this hose is a reliable and cost-effective option. Just be sure to verify the part number for compatibility before purchasing. Highly recommended if you’re doing preventive maintenance or replacing a failed hose as part of a larger cooling system repair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2025
E
Verified Purchase
E. E. Saulsberry
Whiting, US
★★★★★ 5
Fit perfectly
Style: One Piece
Pops right in. Perfect fit and undistinguishable from the original.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
G
Verified Purchase
Green Beacon
Cuba, US
★★★★★ 5
Great product!
Style: Two Pieces
These were a perfect fit for my MB and very easy to install. Great value for the money. They should last given the way they were built.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
P
Verified Purchase
Phong Nguyen
Bozeman, US
★★★★★ 5
Work good
Style: One Piece
Fit and work perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026

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