Replacement Filters

Replacement Filters: the drop-in element that keeps your intake breathing

A replacement filter is the media element that sits inside your factory airbox or an aftermarket intake and traps dirt before it reaches the engine. These are replacement filters in the truest sense: you pull the old element, drop the new one in, and you are done. People fit them for two reasons. First, the original filter is spent and airflow is choked. Second, they want a reusable, cleanable element instead of a paper throwaway, so the same filter serves for years with a wash and re-oil between service intervals.

Unlike a full intake, a drop-in element does not change the tube, the airbox, or the sensor location. That makes it the lowest-risk airflow part you can fit, and it keeps the factory intake path intact.

What ThreePiece stocks

This category holds 112 filters across 17 brands. K&N Engineering leads the range with 36 products, followed by aFe with 17 and Airaid with 12. BMC, Uni Filter, Weapon R, COBB, GReddy, HKS, Perrin Performance, Spectre and others fill out the rest. Prices currently run from $39 to $1,229 for what is in stock right now - that is a live range, not a promise, and it swings with brand and application.

The low end covers common cleanable elements; the top end is race-grade carbon, like the BMC 991.2 GT2 RS Carbon Racing Filter and the BMC Aventador LP700-4 Flat Carbon Racing Filter. In the middle you will find truck and sports-car options such as the aFe Magnum FLOW Pro GUARD7 for the 2025 RAM 1500 RHO, its dry sibling the Pro DRY S version, and the Airaid direct-replacement dry filter for the 97-04 Corvette C5. There is also a universal option like the Spectre ExtraFlow 14in. x 3in. value pack.

Fitment data on 36 of these products spans model years 1997 to 2025 and includes vehicles such as the Chevrolet Corvette, Subaru WRX and STI, Ford Mustang, Nissan Titan, RAM 1500 RHO, Cadillac XTS, Honda CR-V, Audi A4 and RS3, BMW 3 Series and Porsche 911.

How to choose

The main trade-off here is oiled versus dry media. Oiled cotton filters typically flow well and are reusable but need re-oiling; dry synthetic filters skip the oil step and re-oil worry. Both aFe RAM options above show that split - GUARD7 versus Pro DRY S - on the same truck. The second choice is direct-fit versus universal: a direct-replacement element like the Airaid Corvette part drops into the factory box, while a universal assembly like the Spectre pack needs the right diameter and length for your setup.

What else you need

If you want more than an element, step up to Cold Air Intake Kits or Cold Air Intakes. Related filter categories include Replacement Air Filters, Drop In Filters, Air Filter Elements and Panel Filters. Browse everything in the parent Air Intakes section.

Fitment help and ordering

Not sure a filter matches your vehicle? Call fitment help at 813-535-5801 or use our contact page. All orders ship free, and Affirm and Katapult financing is available at checkout.

Replacement Filters: the drop-in element that keeps your intake breathing

A replacement filter is the media element that sits inside your factory airbox or an aftermarket intake and traps dirt before it reaches the engine. These are replacement filters in the truest sense: you pull the old element, drop the new one in, and you are done. People fit them for two reasons. First, the original filter is spent and airflow is choked. Second, they want a reusable, cleanable element instead of a paper throwaway, so the same filter serves for years with a wash and re-oil between service intervals.

Unlike a full intake, a drop-in element does not change the tube, the airbox, or the sensor location. That makes it the lowest-risk airflow part you can fit, and it keeps the factory intake path intact.

What ThreePiece stocks

This category holds 112 filters across 17 brands. K&N Engineering leads the range with 36 products, followed by aFe with 17 and Airaid with 12. BMC, Uni Filter, Weapon R, COBB, GReddy, HKS, Perrin Performance, Spectre and others fill out the rest. Prices currently run from $39 to $1,229 for what is in stock right now - that is a live range, not a promise, and it swings with brand and application.

The low end covers common cleanable elements; the top end is race-grade carbon, like the BMC 991.2 GT2 RS Carbon Racing Filter and the BMC Aventador LP700-4 Flat Carbon Racing Filter. In the middle you will find truck and sports-car options such as the aFe Magnum FLOW Pro GUARD7 for the 2025 RAM 1500 RHO, its dry sibling the Pro DRY S version, and the Airaid direct-replacement dry filter for the 97-04 Corvette C5. There is also a universal option like the Spectre ExtraFlow 14in. x 3in. value pack.

Fitment data on 36 of these products spans model years 1997 to 2025 and includes vehicles such as the Chevrolet Corvette, Subaru WRX and STI, Ford Mustang, Nissan Titan, RAM 1500 RHO, Cadillac XTS, Honda CR-V, Audi A4 and RS3, BMW 3 Series and Porsche 911.

How to choose

The main trade-off here is oiled versus dry media. Oiled cotton filters typically flow well and are reusable but need re-oiling; dry synthetic filters skip the oil step and re-oil worry. Both aFe RAM options above show that split - GUARD7 versus Pro DRY S - on the same truck. The second choice is direct-fit versus universal: a direct-replacement element like the Airaid Corvette part drops into the factory box, while a universal assembly like the Spectre pack needs the right diameter and length for your setup.

What else you need

If you want more than an element, step up to Cold Air Intake Kits or Cold Air Intakes. Related filter categories include Replacement Air Filters, Drop In Filters, Air Filter Elements and Panel Filters. Browse everything in the parent Air Intakes section.

Fitment help and ordering

Not sure a filter matches your vehicle? Call fitment help at 813-535-5801 or use our contact page. All orders ship free, and Affirm and Katapult financing is available at checkout.