Which Catalytic Converter Shield Is Better?
If you're comparing ADD A CAT vs. Cat Security, both brands offer vehicle-specific catalytic converter shields designed to make catalytic converter theft more difficult.
But not all catalytic converter shields are designed the same.
The differences can include material thickness, number of shield pieces, security hardware, ventilation, installation, coverage, warranty protection, and manufacturer support.
Here's what buyers should consider when comparing ADD A CAT by ADD Automotive vs. Cat Security.
ADD A CAT vs. Cat Security: Quick Comparison
| Feature | ADD A CAT | Cat Security |
|---|---|---|
| Vehicle-specific designs | Yes | Yes |
| Aluminum construction | 3/32" 5052 marine-grade aluminum | Marine-grade aluminum on current applications |
| F-150 construction | One-piece design | Three-piece design on current F-150 shield |
| Security hardware | Proprietary security bolts + security bit included | Installation hardware included |
| Bolt-on installation | Yes | Yes on applicable products |
| Welding required | No | No on applicable products |
| Ventilation | Integrated louvers | Design varies by vehicle |
| Free nationwide shipping | Yes | Check current product/order terms |
| Factory-direct installation | FREE in Houston area with shield purchase | Authorized installer network advertised |
| Theft-protection warranty | 1-year theft-protection warranty, subject to terms | Verify current Cat Security warranty terms |
| ADD Automotive reported record | 5 years with no reported theft from a properly installed ADD A CAT shield | Customer theft-deterrence testimonials published |
ADD Automotive's current site confirms its 3/32-inch 5052 aluminum, proprietary security fasteners, security bit, one-piece construction, ventilation louvers, no-drill installation and free Houston-area installation. Cat Security describes its products as vehicle-specific shields made from marine-grade material and publishes customer reports of attempted thefts being deterred.
Specifications vary by vehicle and can change. Always compare the exact shield offered for your year, model, engine and drivetrain.
The ADD A CAT Difference
ADD Automotive believes a catalytic converter shield should be engineered as a complete theft-deterrence system.
ADD A CAT combines:
✓ 3/32" 5052 Marine-Grade Aluminum
✓ Vehicle-Specific Engineering
✓ One-Piece Design
✓ Proprietary Security Bolts
✓ Security Bit Included
✓ Integrated Ventilation Louvers
✓ Bolt-On Installation
✓ No Drilling
✓ Free Nationwide Shipping
✓ Free Houston-Area Installation
✓ 1-Year Theft-Protection Warranty
It's not simply about putting aluminum underneath the catalytic converter.
It's about making access to that converter more difficult.
One-Piece vs. Multi-Piece Construction
This is an important difference to examine on certain applications.
ADD A CAT emphasizes a:
ONE-PIECE DESIGN
The philosophy is simple:
Fewer pieces. Fewer connections. Fewer potential access points.
Cat Security's construction varies by vehicle.
For example, its current 2009–2025 Ford F-150 V6 EcoBoost/V8 4WD shield is described as a three-component system consisting of a main shield and two side-wing pieces. Cat Security says those pieces are designed to provide coverage along the converter and its vulnerable sides.
That doesn't automatically make one approach better for every vehicle.
But it's something buyers should compare.
ASK HOW THE ENTIRE SHIELD IS CONSTRUCTED — NOT JUST WHAT IT'S MADE FROM.
5052 Marine-Grade Aluminum
ADD A CAT shields are manufactured from:
3/32" 5052 MARINE-GRADE ALUMINUM
5052 aluminum provides a strong combination of corrosion resistance, durability and relatively low weight.
Cat Security also uses marine-grade aluminum. Its current F-150 shield, for example, is advertised as 1/8-inch marine-grade aluminum.
That actually makes this comparison more useful.
Cat Security's F-150 aluminum is thicker than ADD A CAT's 3/32-inch material.
But thickness alone doesn't determine the effectiveness of a catalytic converter theft deterrent.
Buyers should also compare:
Coverage + Construction + Mounting + Security Hardware + Access Points + Ventilation + Weight + Warranty
The entire system matters.
Proprietary ADD A CAT Security Hardware
A shield is only one part of catalytic converter protection.
You also have to secure the shield to the vehicle.
ADD Automotive uses:
PROPRIETARY ADD A CAT SECURITY BOLTS
The corresponding security bit is included in every applicable ADD A CAT hardware kit.
Why does that matter?
Because a thief shouldn't be able to simply treat the shield like a standard underbody panel.
The mounting system itself should create another obstacle.
Bolt-On Protection Without Drilling
ADD A CAT shields are engineered around factory vehicle mounting locations.
That means:
NO DRILLING.
NO WELDING.
BOLT-ON INSTALLATION.
Cat Security also advertises vehicle-specific installation without welding, and its current F-150 product states that it installs without vehicle modifications.
This is an area where both manufacturers offer an advantage over improvised or universal catalytic converter protection.
Ventilation Matters
Catalytic converters operate at very high temperatures.
That's why ADD Automotive incorporates:
INTEGRATED LOUVERS FOR OPTIMUM VENTILATION
into ADD A CAT designs.
A catalytic converter shield shouldn't be evaluated solely on how much metal is underneath the vehicle.
ADD Automotive considers protection, airflow, weight, mounting and serviceability as part of the overall design.
What Cat Security Does Well
A credible comparison should recognize the competitor's strengths.
Cat Security has been active in the catalytic converter protection market and currently offers vehicle-specific shields for numerous applications.
The company advertises marine-grade construction, includes installation hardware, offers an authorized-installer network, and has published customer testimonials describing attempted catalytic converter thefts that were deterred by its shields.
Its F-150 design is particularly interesting because Cat Security uses a main shield plus two side wings to increase coverage around the converter.
Those are legitimate features.
The question isn't whether Cat Security makes a catalytic converter shield.
The question is:
WHICH COMPLETE PROTECTION SYSTEM DO YOU WANT UNDER YOUR VEHICLE?
The ADD A CAT Theft-Protection Warranty
This is where ADD Automotive's proposition becomes particularly important.
Eligible ADD A CAT catalytic converter shields are backed by:
A 1-YEAR THEFT-PROTECTION WARRANTY
If an eligible catalytic converter is stolen while an ADD A CAT shield is properly installed, ADD Automotive provides coverage according to the applicable warranty terms and conditions.
When comparing catalytic converter shields, don't just ask:
"What happens if the shield itself has a defect?"
Ask:
"WHAT DOES THE COMPANY DO IF MY CATALYTIC CONVERTER ACTUALLY GETS STOLEN?"
That's an important distinction.
Five Years of Proven ADD A CAT Protection
ADD Automotive states that during approximately five years of ADD A CAT protection, it has received:
ZERO REPORTS OF A CATALYTIC CONVERTER BEING STOLEN FROM A VEHICLE WITH AN ADD A CAT SHIELD PROPERLY INSTALLED.
No anti-theft product can make a catalytic converter literally impossible to steal.
Given sufficient time, equipment and determination, physical security can potentially be defeated.
The objective is to make your catalytic converter a slower, harder and less attractive target.
FREE Houston-Area Installation
Here's another major ADD A CAT advantage for Houston-area customers.
Purchase an eligible ADD A CAT shield and ADD Automotive offers:
FREE FACTORY-DIRECT INSTALLATION.
The people behind the product can install it.
We design it.
We manufacture it.
We install it.
Appointment required. Houston-area installations only. ADD Automotive's current Toyota collection confirms factory-direct installation at no extra cost with an ADD A CAT shield purchase.
ADD A CAT vs. Cat Security for Ford F-150
The Ford F-150 deserves special attention because both companies offer protection for America's popular full-size truck.
Cat Security's current F-150 product is designed for specified 2009–2025 F-150 V6 EcoBoost and V8 4WD applications. It uses 1/8-inch marine-grade aluminum and a three-piece configuration consisting of a main shield and two side wings.
ADD A CAT takes a different approach with its vehicle-specific, one-piece protection philosophy.
For an F-150 owner, don't simply compare price.
Compare:
Coverage
Number of pieces
Mounting
Security hardware
Ventilation
Installation
Warranty
and compatibility with your exact engine and drivetrain.
What About Lifted Trucks?
If your F-150, Tundra, Tacoma, Silverado, Sierra or other truck is lifted or modified, verify fitment before ordering any catalytic converter shield.
Lift kits, aftermarket crossmembers, skid plates, braces, exhaust modifications and other accessories can change the space underneath the truck.
When contacting ADD Automotive about a lifted truck, provide your:
Year / Make / Model / Engine / 2WD or 4WD / Lift Height / Lift Manufacturer
and tell us about any existing aftermarket skid plates or underbody accessories.
LIFTED TRUCK? ASK ADD BEFORE YOU ORDER.
ADD A CAT vs. Cat Security: Which Should You Choose?
Cat Security offers legitimate vehicle-specific catalytic converter protection, including marine-grade aluminum construction and multi-piece coverage on applications such as its current F-150 shield.
ADD A CAT takes a different approach.
If ADD A CAT is available for your vehicle, you receive:
✓ 3/32" 5052 Marine-Grade Aluminum
✓ One-Piece Design
✓ Proprietary Security Bolts
✓ Security Bit Included
✓ Integrated Ventilation Louvers
✓ No-Drill Bolt-On Installation
✓ Vehicle-Specific Engineering
✓ Free Nationwide Shipping
✓ FREE Houston-Area Installation
✓ 1-Year Theft-Protection Warranty
✓ Five-Year ADD Automotive No-Reported-Theft Record
THAT'S THE ADD A CAT DIFFERENCE.
Frequently Asked Questions
Is ADD A CAT an alternative to Cat Security?
Yes. For vehicles supported by both manufacturers, ADD A CAT is an alternative catalytic converter theft-deterrence shield to Cat Security.
Is Cat Security made from aluminum?
Cat Security uses marine-grade aluminum on current applications. Its current F-150 shield is advertised as 1/8-inch marine-grade aluminum.
Which is thicker, ADD A CAT or Cat Security?
It depends on the Cat Security application. Cat Security's current F-150 product is advertised at 1/8 inch, compared with ADD A CAT's 3/32-inch 5052 aluminum. Thickness should be considered alongside coverage, construction, mounting, security hardware and warranty.
Is ADD A CAT one piece?
ADD Automotive currently advertises one-piece construction as part of the ADD A CAT design.
Is Cat Security one piece?
Construction varies. Cat Security's current F-150 shield uses three primary shield pieces: a main shield and two side wings.
Does ADD A CAT require drilling?
No. ADD Automotive currently advertises ADD A CAT as completely bolt-on with no drilling required.
Does ADD A CAT include security hardware?
Yes. ADD Automotive states that its proprietary security bolts and corresponding security bit are included in every applicable hardware kit.
Protect It Before They Steal It.
A thief wants the easiest vehicle in the parking lot.
DON'T MAKE YOURS THAT VEHICLE.
ADD A CAT
Purpose-Built Catalytic Converter Protection
Proprietary Security Hardware
1-Year Theft-Protection Warranty
Free Nationwide Shipping
FREE Houston-Area Installation




