K&N 3.375in Length 1.125in OD Universal Replacement Fuel Filter - 81-0301

The K&N 3.375in Length 1.125in OD Universal Replacement Fuel Filter (P/N 81-0301) from K&N Engineering is a replacement element kit built to service the K&N 81-0300 clear view in-line fuel filter. Instead of buying an entirely new fuel filter housing, this kit lets you rebuild your existing 81-0300 filter with fresh filtration media and sealing hardware, restoring clean fuel flow to your engine at a fraction of the cost of a full replacement unit.

Key Features & Benefits

• Includes three replacement filter elements, giving you enough media for multiple service intervals on your 81-0300 clear view fuel filter
• Comes with six o-ring seals to ensure a proper, leak-free reseal every time you service the filter
• Purpose-built as a service kit for the K&N 81-0300 housing, so you're not paying for an entirely new fuel filter body
• Backed by K&N Engineering, a trusted name in aftermarket filtration components
• Compact element sizing (3.375in length, 1.125in OD) matches the internal chamber of the 81-0300 clear view fuel filter

Specifications

• Brand: K&N Engineering
• MPN: 81-0301
• SKU: KNN81-0301
• UPC: 024844343161
• Filter element length: 3.375 in
• Filter element outer diameter: 1.125 in
• Kit contents: 3 replacement filter elements and 6 o-ring seals

Fitment

This element kit is designed specifically to service the K&N 81-0300 clear view universal in-line fuel filter housing. Because the 81-0300 is a universal fuel filter, this replacement element kit is not tied to a specific vehicle make or model — it fits wherever an 81-0300 filter is already installed. Note that this kit is sized for the 81-0300 housing only and is not interchangeable with other K&N fuel filters such as the PF-5000 or the 81-1011 100-micron in-line filter, which use different element sizes and housings.

What's in the Box

• 3 replacement fuel filter elements
• 6 o-ring seals

Why Buy from ThreePiece.us

ThreePiece.us backs every order with free shipping and financing through Affirm, so you can service your K&N fuel filter without the upfront cost hitting all at once. If you're unsure whether this element kit is the right match for your existing K&N fuel filter, our team is available to help confirm compatibility before you order.

Frequently Asked Questions

What does the K&N 81-0301 kit include?
It includes three replacement filter elements and six o-ring seals for servicing the 81-0300 clear view fuel filter.

Will this fit my vehicle?
This is a universal service kit for the K&N 81-0300 fuel filter housing rather than a vehicle-specific part, so fitment depends on whether your vehicle already uses the 81-0300 filter.

Does this work with other K&N fuel filters, like the PF-5000?
No — this element kit is sized specifically for the 81-0300 housing and is not designed for other K&N fuel filters such as the PF-5000 or 81-1011.

Does ThreePiece.us offer financing on this item?
Yes, financing is available through Affirm at checkout, and orders ship free.