5th Gen 4Runner Performance Air Filter

 In 4Runner, 4Runner Mods, 5th Gen 4Runner Mods, Aftermarket Install

5th Gen 4Runner Performance Air Filter – K&N

5th Gen 4Runner Performance Air Filter - K&N

K&N Performance Air Filter Swap on 5th Gen 4Runner – Aftermarket Air Filter for 5th Gen 4Runner (TRD or K&N?)

Performance in an Air Filter? Really? Well, kinda.

The K&N air filter or any performance air filter for that matter is designed to increase airflow. Anytime you can increase airflow on your 4Runner, this is a good thing. We are always looking for ways to increase airflow and power performance on our 4Runner. The K&N filter does help with this.

You can expect to see as much increase in power as you would think, not much. The power you will see is nothing compared to a TRD Intake or a new Magnaflow Exhaust, or even a Magnuson Supercharger. But, it is definitely nice knowing that you are not reusing a bunch of syntactic paper filters every time you get a service.

Reusable air filters really are great for the environment. If only every vehicle in the world has reusable air filters, think about the amount of waste we would reduce. Do your part and get yourself a new 4Runner Intake or a new reusable 4Runner Air Filter.

Your 4Runner should run more efficiently with a better air filter. This is all relative though. You will hear a back and forth debate on both sides of the fence here. Some guys would never buy a K&N filter and some would buy one time and time again.

4Runner Air Filter Options

At the end of the day, I would buy a K&N Intake if I had to do it over. We purchased the TRD Intake in 2016 and at first loved it. But, we had not heard the K&N intake on another 4Runner.

I recently heard the K&N intake on another 4Runner and loved the sound. If you are on a budget and not looking to go for a full intake, then definitely grab an aftermarket air filter.

The K&N Performance Air Filter

The K&N Performance Air Filter is designed to increase horsepower and acceleration for your 4Runner. The K&N Filter is completely washable, reusable and there’s a lifetime 1,000,000-mile limited warranty.

K&N claims to have some of the worlds best air filters on the market and rightfully so. There are millions of them sold every year. Cars, trucks, and SUVs everywhere depend on K&N to get the job done. Whether you have a K&N filter or a K&N intake, you can trust that you are running a quality product. 

This specific high-flow original cotton K&N Performance Air Filter was invented by K&Ns in-house R&D engineering team. The filter is designed to reduce air filter restriction, allowing an engine to breathe easier than traditional paper air filters.

Using a K&N Performance Air Filter can actually increase horsepower and acceleration in your 4Runner. This is what K&N claims but I wouldn’t count on racing down the freeway after you install one. In other applications such as the K&N intake, yes. Millions of car, truck, and SUV owners and professional racers choose K&N Performance Air Filters and Intakes over restrictive disposable air filters and stock air boxes. They do make bad ass products. 

Also, Toyota outsources many of their performance air filters to companies like K&N. Just like they outsource their superchargers to companies like Magnuson supercharger‘s as well as outsourcing their intakes to companies like AFE. 

The K&N Performance Air Filter comparison chart

K&N Air Filter Performance Chart

The dust-free air flow test performed on laboratory equipment by K&N Performance Air Filter experts. These charts are examples of individual filters. Results will vary depending on part number in the 4Runner. Complete test protocol and results available at the K&N website.

K&N Performance Reusable Air Filters

Over 100 million disposable air filters are discarded each year. K&N invented reusable cotton air filters to help reduce the waste problem in America, and have sold over 20 million since 1969. A K&N Performance Air Filter is washable, reusable and will last for the life of your 4Runner. Instead of paper or synthetic materials, K&N Performance Air Filters use multiple layers of treated cotton gauze.

The natural characteristics of cotton help create a remarkable filter that can provide outstanding performance and very high air flow rates which alternately increases your horsepower and acceleration. 

Cleaning your K&N Performance Air Filter

Clean your 4Runner K&N Performance Air Filter every 50,000 miles. This filter requires cleaning every 50,000 miles for highway use, more often for dusty conditions or for general loss restriction. For detailed filter cleaning instruction visit the K&N website.

K&N Filters are Tough on Dirt

The design: thousands of microscopic cotton thread’s absorbency and specifically formatted oil to create a powerful filtering method. As part of K&Ns performance and commitment to protecting our 4Runner’s engine, they consistently test the efficiency using ISO 5011 test protocols.

The 1,000,000 mile limited warranty

K&N Performance Filters are built so well that they guarantee them for 1,000,000 miles. Yes, you read that right K&N Filters guarantee their product for over 1,000,000 miles.

This means you can call K&N at any time if your air filter fails and they will replace your air filter at no additional cost. You can highly count on K&N to deliver quality products time and time again for our off-road vehicles.

K&N Performance Air Filter Swap Process

5th Gen Air Filter Replacement Step #1 – Unhook OEM air box brackets x4

5th Gen Air Filter Replacement Step #1 - Unhook OEM air box brackets x4

There are four tabs on the stock 4Runner air box. Start by lifting the brackets on all four corners. Each corner of the airbox will lift up.

5th Gen Air Filter Replacement Step #2 – Disconnect MAF Sensor and Loom Bracket

5th Gen Air Filter Replacement Step #2 - Disconnect MAF Sensor and Loom Bracket

You do not have to unclip your MAF (Mass Airflow) sensor and the wiring loom that it is connected to. I recommend doing this, just in case. With the MAF disconnected and the tab on the loom disconnected, you will a little more flexibility from your stock airbox.

5th Gen Air Filter Replacement Step #3 – Lift out OEM Filter

5th Gen Air Filter Replacement Step #3 - Lift out OEM Filter

Pop the lid on your airbox and then pull the OEM filter.

5th Gen Air Filter Replacement Step #4 – Swap in New Aftermarket Filter

5th Gen Air Filter Replacement Step #4 - Swap in New Aftermarket Filter

Swap in your new K&N air filter. Or, whatever aftermarket filter you are going to swap in.

5th Gen Air Filter Replacement Step #5 – Connect MAF Sensor, Loom Bracket, and Shut Box

5th Gen Air Filter Replacement Step #5 - Connect MAF Sensor, Loom Bracket, and Shut Box

This will take you about 5 minutes. The replacement of an air filter is incredibly easy. If you are looking for a quick little mod to do before work, this is about as simple as it gets.

I know there are some of you out there who would never install an aftermarket filter. And, some of you that have already installed and seen no problems whatsoever.

Let’s hear your comments below. Did you install an aftermarket filter? Are you going to install a new filter? If you have any questions about this filter, let us know. Thanks, everyone!

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  • Tom

    K&N Filters — While they may improve air flow, it comes at a price. They do not filter dirt particles as efficiently as a paper filter, and the oil build up in the intake is just nasty, and with it comes dirt stuck to the oil. I loved mine, at first, until I put enough miles and exposed it to enough dirt to find out the disadvantages of a K&N

    Great site BTW!

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