K&N Unique Air Filter - Replacement Element for RK-3931

K&N Unique Air Filter - Replacement Element for RK-3931

Marsoni

M251S

$83.99

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

K&N Unique Air Filter - Replacement Element for RK-3931The K&N replacement air filter for RK Series air cleaner assemblies is designed to increase horsepower and acceleration while providing excellent filtration. The air filter is washable and reusable and designed to be used as a replacement air filter for specific K&N RK Series air cleaner assemblies for Harley Davidson motorcycles. The air filter is covered by the famous K&N Million Mile Limited Warranty.

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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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This coat arrived promptly, and I am very pleased with it. Very wrinkled, but it ironed up real nice. My husband is usually in between a Size L and an XL. I ordered an L first and it was too tight, so I returned it and ordered an XL and it was too big, so I would say the sizing is spot-on. I was able to take up the sides enough that it now looks good on him. The fabric and construction seem sturdy. He is wearing it to an Edgar Allan Poe function, and I think he will look fabulous.

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Reviewed in the United States on August 23, 2025

Verified Purchase

Michael Brown Jr

West Palm Beach, US

★★★★★ 5

Loved the fit

Looked great with my outfit

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Reviewed in the United States on April 17, 2026

Verified Purchase

Nick

Port Orchard, US

★★★★★ 5

Good fit

Color: Light Grey, Size: Medium

A nice vest and a true slim fit. Good quality for the price and no satin back, the material is used for the whole vest, allowing it to be worn without a jacket and still look smart. I am 6' 3" and 200lbs with a slim build, the Medium size fit like a glove, snug but not tight as a waistcoat should be.

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Reviewed in the United States on May 29, 2022

Verified Purchase

Spoot

Birmingham, US

★★★★★ 4

Good Fit, Fold Lines

5'9, around 125-130 pounds, and the Small fit me just fine. Adjuster strap provides a great range of... adjustment. Good waistcoat if you are looking for something quick and cheap. With it being cheap, however, the material suffers. Due to it being folded while in shipping, there are seem lines going down the sides of the waistcoat which make it poke out and look awkward.

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Reviewed in the United States on April 9, 2022

Verified Purchase

Heather S.

Grantham, US

★★★★★ 5

Great vest for a great price!

This vest is more slim fitting, stylish, & flattering than many vests. It fits as expected, but it is adjustable in the back, so you do have some wiggle room to tighten & loosen it if you’re unsure about the size. My son wore this vest to homecoming. He is 5’ 10” & 150 lbs, & the size small was a good fit.

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Reviewed in the United States on October 20, 2022