K&N Universal Clamp-On Air Filter 2-3/4in FLG / 5-1/16in B / 3-1/2in T / 4-3/8in H

K&N Universal Clamp-On Air Filter 2-3/4in FLG / 5-1/16in B / 3-1/2in T / 4-3/8in H

Marsoni

M251S

$94.99

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

K&N Universal Clamp-On Air Filter 2-3/4in FLG / 5-1/16in B / 3-1/2in T / 4-3/8in HSKU: RU 5135 UPC: 024844394378 K&N Universal Clamp On Air Filter 2 3 4in FLG 5 1 16in B 3 1 2in T 4 3 8in H K&N RU 5135 is a round clamp on universal air filter designed for racing vehicles radio controlled cars generators snowmobiles tractors and custom air intake setups regardless of intake angle or offset. This filter delivers increased airflow for better horsepower and acceleration while trapping contaminants with premium cotton gauze media.

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I haven't had a flat tire yet, so I also haven't had occasion to test these but they seem like great value for an extremely low price (especially versus a new tire.) I have handled them to try and gauge how quickly they'd smooth a hole, and they're rough / sharp and aggressive enough that I expect them to work quickly and well on not only tires, but on a variety of other materials. This pattern in particular should allow material to be shed and then passed backward pretty easily without clogging things up or slowing them down. If you've bothered to buy a patch kit for your tires, you really ought to have one of these around.

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Reviewed in the United States on January 18, 2026