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MillerCAT Corp

MILLERCAT 2016-2022 Prius Gen 4 Cat Shield™

MILLERCAT 2016-2022 Prius Gen 4 Cat Shield™

17 total reviews

Regular price $140.00 USD
Regular price Sale price $140.00 USD
Sale Sold out
Shipping calculated at checkout.
Choose a Security Screw Kit for your Cat Shield™


Fits all 2016-2022 Prius Liftback and Prius Prime Trims with OEM converters. Comes with Cat Shield, installation hardware, Cat Shield Protected sticker, and detailed installation guide. 

Our Aluminum Gen 4 Cat Shield™ is the only completely drill-less shield for the Gen 4 Prius. The shield uses existing mounting points so you will not have to drill into the vehicle. Fits all Gen 4 Prius without needing to buy additional parts. The shield is completely flush with the underbody that it looks like it came directly from the factory. Fully removable and galvanic corrosion resistant. 

Material: Premium Grade 5052 Aluminum | 14 Gauge

304 stainless steel version availableStainless vs Aluminum

Upgrade Options: MILLERCAT Custom Screw Kit. Info on screw options

REQUIRED TOOLS FOR INSTALLATION. 5/16" bit driver or 5/16" socket, 10mm socket, 12mm socket, 13mm wrench, and panel fastener removal tool or flat head screw driver. Installation Guide



* Item may have some surface finish imperfections.

Free Shipping Info

Free shipping is available to the lower 48 States. 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 17 reviews


David Hansen
For my Prius prime

Muffler shop recommended this shield from Miller Cat, perfect fit and easy to install, a well made product

Jesus Villarreal
Very easy

Very easy to install. Very sturdy. When I get a new car I will buy this product again.

Richard Martin
Mechanic loves it

My mechanic installed it and was enthusiastic. He asked for the specs to pass to another client.

Herbert M Brandt
OEM hardware, easy to install.

Excellent instructions and easy to install. I followed the video on their website and everything else on installation was easy. I have a 2021 Prius prime and the cat shield installed in less than one hour. If you are mechanically inclined you won't have a problem installing the shield. I do agree with other reviews in that it's at least a good deterrent to thieves because it increases their theft time. In reality, if a thief is **** bent on stealing it they're gonna take a bigger risk of getting caught removing the shield to get at the cat. I feel good about my investment.