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MILLERCAT 2016-2022 Prius Gen 4 Cat Shield™

MILLERCAT 2016-2022 Prius Gen 4 Cat Shield™

Regular price $140.00 USD
Regular price Sale price $140.00 USD
Sale Sold out


Toyota Part Number:

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.

Shipping calculated at checkout.

Choose a Security Screw Kit for your Cat Shield™
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Toyota Prius Gen 4 Anti Theft Catalytic Converter

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 | Stainless Steel 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:  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

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.

Installation Guide:



5/16" bit driver or 5/16" socket, 10mm socket, 12mm socket, 13mm wrench, and panel fastener removal tool or flat head screw driver.

* Item may have some surface finish 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 fulfill.

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.


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.

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.

Customer Reviews

Based on 117 reviews
Madeline McCarren
easy installation

It took my mechanic 3/4 hr to install. I think the extra cost for the higher quality of this shield over others was mostly made up by saving on labor to install (no drilling)! A chain had estimated 2-2.5 hrs!

Bill N
Excellent product

This appears to be a very good product. There were detailed instructions but it took about 1.5 hours for the shop to install it because it was different from previous versions they had installed. Hopefully it will protect as advertised.

Marshall J Jose
Finally got it attached

I only had ramps, which I put on top of 2x8s to give me another 1.5", which it turns out I absolutely needed to be able to reach in and complete the installation. The materials, dimensional accuracy, and fasteners were all excellent. If I had to do it again, I would find a lift, or find someone with a lift to do it.

Sherri Pond
Great Service!!

I am VERY pleased with my purchase. Ordered on a Friday and received it on Monday. The guy who installed it said it was a great design and was impressed with the quality and price. He was actually the one who told me I should go with Millercat. A+

Barbara Benham
22 Prius Gen 4 Cat Guard

Fit perfectly, took less than 30 minutes