


K&N Filter Universal X Stream Clamp-On 3 inch Flange 6 inch Base 5 inch Top 5 9/16 inch Height
Marsoni
M251S
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Friday, May 29
K&N Filter Universal X Stream Clamp-On 3 inch Flange 6 inch Base 5 inch Top 5 9/16 inch HeightSKU: RX 4990 UPC: 024844094773 K&N RX 4990 Universal X Stream Clamp On Air Filter 3in Flange 6in Base 5in Top 5 9 16in Height for 2005 Ford Focus The K&N RX 4990 is a universal X Stream clamp on air filter designed for custom performance applications including 2005 Ford Focus ZX3 ZX4 ZX5 ZXW models. This round tapered filter features a 3 inch centered flange base outside diameter of 6 inches top outside diameter of 5 inches and 5 9 16 inch height for
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4.0 ★★★★★
Based on 669 reviews
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Product Reviews
★★★★★ 4
Not oem but ok
Size: (Pack of 1)
It’s a filter
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 11, 2025
★★★★★ 5
Great Engine Air Filter For Honda Accord Speed 2.0 2018
Size: (Pack of 1)
It is one of the 2 engine air filters available on Amazon for Honda Accord Speed 2.0 2018. I see the same quality as the original OEM engine air filter. Perfect fit. The other one is K&N 33-5074, but at a much higher price.
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Reviewed in the United States on April 3, 2024
★★★★★ 5
It Fits
Size: (Pack of 1)
It fits and the engine hasn't blown up yet, so so far so good. More to the point, the increased air flow has yielded better gas mileage and engine response.
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Reviewed in the United States on November 15, 2025
★★★★★ 1
Does not fit 19 accord
Size: (Pack of 1), Size: (Pack of 1)
Does NOT fit the 2019 accord. Literally just tried it and it’s too big.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Grill for BMW
Size: For 2003-2006 E46 2-Door, Color: Carbon Fiber
Looks great could have better clips on them as they are kinda loose.
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Reviewed in the United States on August 5, 2024
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