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MillerCAT Corp

MILLERCAT 2014-2023 Toyota 4Runner 4.0L Cat Shield™

MILLERCAT 2014-2023 Toyota 4Runner 4.0L Cat Shield™


Toyota Part Number:

Regular price $300.00 USD
Regular price Sale price $300.00 USD
Sale Sold out
Shipping calculated at checkout.

4Runner Cat Shield fitment is based on the suspension of the vehicle. If you don't have the X-REAS or KDSS suspension such as on the SR5, SR5 Premium and the TRD Pro, you will want the standard version.

KDSS suspension is typically found on the TRD Off-Road and TRD Off-Road Premium trims.

X-REAS suspension is typically found on the Limited and TRD Sport trims. 

Please verify your suspension type before making your purchase. 

Our shields also will not work with Lift Kits that modify the chassis crossmember!

Protect your Toyota 4Runner 4x4 / 2WD with our Aluminum | Stainless Steel Cat Shield. Our three piece design is a complete bolt-on application (no rivet nuts or drilling needed) that provides the highest level of deterrence against catalytic converter theft. Will work with TRD skid plates. 

Material:  Select either 304 Stainless Steel (16 gauge) for the ultimate deterrence or  5052 Aluminum (12 gauge). Find out more about the difference in material here

- Our shields come with the industry leading tamper-proof screws that you cannot purchase anywhere while other competitors use common torx bits.

- Our 4Runner shield minimizes holes for thieves to cut through. Our stamped louvers and logos provide ample heat dissipation while showing that your shield was made with MILLERCAT quality and manufacturing capabilities.

Installation Guide

*Professional installation recommended. 

Product may come with surface imperfections. 

Free Shipping Info

Free shipping is available to the lower 48 States. Does not include PO Boxes. Orders may take 1-2 business days to fulfilll.

Expedited Shipping Info

Customers who need their products right away may want to pay for expedited shipping. Here are a few things to consider when choosing a faster shipping method.

- Miller CAT provides the option for faster shipping but is only a pass through for any charges. We do not make any money off of this service.

- When calculating your possible receive date, please remember that shipping services do not ship on weekends or holidays and that orders received after 1:00pm PST cannot be guaranteed to ship that day.

- Due to COVID and high volume of shipments, carriers are not always able to meet their target shipping times. Please understand we have no control over shipment tracking or times after the product leaves our facilities. 

- If you live in California or the West Coast, you may not need that expedited shipping. UPS ground can reach your destination in one to two days. 

International Purchases

If you wish to make an international purchase please contact us at By default we only ship to a few international destinations. Please be aware that there may be significant fees for you (the buyer) must pay when you receive the product.

Value Added Taxes (VAT) and import duties are some of the fees that your country will impose on your purchase. We do not know what these fees are and they are solely managed and determined by your customs office.

Warranty Information

We have a 90 day manufacturers warranty against defects from the manufacturing process. This covers issues that prevent the proper installation or performance of the product. 

Cosmetic imperfections that occur either from the manufacturing or shipping process are not covered. We do not manufacture a cosmetic product or ones designed for show. Any undercar product will quickly have scratches and scuffs due to the location of the product and proximity to the road. Click here to find out more about the manufacturing process and what you might expect from your product.

We do NOT guarantee our product against theft. Cat Shields are a deterrence device that is meant to discourage theft and/or make it more difficult for thieves to steal your converter. Given the right tools, technique or time, a thief can still take your converter. However, by having a shield, you are significantly increasing your protection against theft. Similar to a car or home alarm, you are making thieves second guess themselves and consider moving onto another target. Deterrence works and we have countless customer accounts and video evidence that converter theft stopped (for those with repeated theft) or thieves looked and moved on to other vehicles. 


There is a 30 day return policy window for unused products. Please visit this link for more information.

*We do ask that customers carefully make their purchases and reduce the possibility of returns as much as possible. Help us reduce the carbon footprint of these shields as they are large and expensive to ship.

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Customer Reviews

Based on 34 reviews
Cat shield

Easy and quick install can’t complain

Martin Jimenez
Must have shield

Easy to install shield with basic tool set. catalytic converter shield with view access for smog check revision. I feel a lot more comfortable leaving my car parked outside. Highly recommend for anyone worried about their catalytic converters.

Jerry Howeld
So far so good

My CAT’s remain unstolen, so that’s the main thing. It allows me to park more freely and not worry so much about the massive CAT theft problem in Texas.
From a product perspective, I was able to install the shield in an hour after watching the YouTube help video for my vehicle. Installing was pretty easy and I took extra time to grease all the bolts and do it carefully. I’m satisfied at the $300 outlay so far. Apart from the cost of new CAT’s, there’s a 2 month backlog for them to be ordered. I figured the $300 was a gamble worth taking.

Malcolm LeBlanc
Awesome, Piece of Mind

Feels like it'll keep the meth heads away from my cats.

Erik M.
great product

easy to assemble & the product is nicely build.