Air and Fuel› Air Cleaners, Filters, Intakes and Components

UNIFILTER

Uni Filter Uni Foam Filter

$7.57

SKU: U01K NU-4131ST

In Stock
In Stock
Ships by Jul 29
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The UNIFILTER NU-4131ST is a two-stage competition air filter designed for superior filtration and maximum airflow. Its unique two-stage design utilizes a coarse outer layer to capture larger particles and a fine inner layer for ultimate engine protection. This foam, dry-type filter comes in red and is sold individually.

The filter features a Uni-Seal design with a grease groove for an effective seal against the airbox, making it a choice for racing teams. Included with the air filter are instructions for installation.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandUNIFILTER
Part NumberU01K NU-4131ST

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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