catstrap vs catclamp

Best Catalytic Converter Security Devices

Best Catalytic Converter Security Devices


we will talk about the best catalytic converter security devices, and you can view this video about a review of security systems for catalytic converters.

Some of these gadgets were put to the test by Donut Media!




Catalytic converters play an important role in reducing harmful emissions from vehicles, but they are also a popular target for thieves.

With the rise in metal prices and the valuable metals found inside, it’s important to take steps to protect your catalytic converter from theft.


Catalytic converters can be expensive, with some costing over $2,000, and they are also highly susceptible to theft.

In fact, they can be stolen in less than two minutes, making them an attractive target for thieves.

As a result, owners of vehicles with multiple converters can face significant expenses.

To help you safeguard your catalytic converters, we have reviewed the most popular security devices on the market.

By understanding the pros and cons of each device, you can make an informed decision on which one is right for your vehicle.


Underbody Catalytic Converter Strap/Wires (Cat Clamp)

This security system consists of steel cables that wrap around the catalytic converter, making it difficult for thieves to saw through.

The cables are tightly fitted but allow for a small amount of movement. However, the strength of the steel cables makes it challenging to cut through.

This device may not fit every vehicle, and installation can be difficult, especially for large or small cars. It can also cause a rattling noise when driving and may not provide enough protection for full-sized pickups.

Additionally, it may require modifications to fit certain vehicles and can make the car look messy when viewed from underneath.


  • Difficult to cut through
  • Resistant to rust


  • May not fit every vehicle
  • Difficult to install
  • Can cause a rattling noise
  • May need modifications
  • Not aesthetically pleasing
  • May be cut with an angle grinder
  • Multiple kits are required for multiple converters
  • Can potentially damage the vehicle if cables become loose

Underbody Catalytic Converter Alarm

Underbody alarms are motion or heat-sensitive devices that activate when the exhaust system is jostled or when a sudden temperature change is detected. Some alarms are custom-made to fit a specific model of vehicle, but they can come with a higher price tag due to increased engineering and manufacturing costs.


  • Relatively inexpensive
  • Universal fit


  • May need to be manually armed and disarmed
  • Not waterproof
  • Potential for false alarms
  • Sensitive to moisture
  • Motion sensors may need regular maintenance


Anti-Theft Catalytic Converter Stickers

Anti-theft stickers are cost-effective visual deterrents that warn potential thieves that the catalytic converter is fitted with a security device.

They should be used in conjunction with other security systems to provide maximum protection.

However, the stickers need to be displayed in a prominent area, and thieves working underneath the vehicle may not even look for them.


  • Visual deterrent
  • Cheap
  • Can be attached to any vehicle


  • Difficult to see at night
  • Easily peeled off
  • May fade in the sun
  • May not be noticeable to thieves
  • Offers no physical security system
  • Easily ignored

Catalytic Converter Shields

Catalytic converter shields, also known as cat shields, are physical metal barriers that attach to the underside of a vehicle and cover the catalytic converter.

The best shields come with optional tamper-proof screws for additional security and should be installed by a professional.

The shields use the structural rigidity of the vehicle’s chassis to make them difficult to remove by thieves.

When choosing a cat shield, consider the material it is made of. 304 stainless steel is more dense and rigid than aluminum and is resistant to corrosion, making it a better choice for long-term protection.


  • The best catalytic converter security system for your vehicle
  • Rust resistant
  • Can be fitted with optional extras like tamper-proof screws for even greater security
  • Incredibly difficult to cut through
  • Arduous to remove or bypass by thieves
  • Can be easily removed with the supplied security key


  • Not all catalytic converter shields offer the same level of protection
  • May need to be installed by a mechanic

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When choosing the right catalytic converter security device for your vehicle, consider the following:

  1. The type of vehicle you drive: Depending on the size and shape of your vehicle, certain security devices may not be suitable. Consider whether a strap or wire, alarm, sticker, or shield will be appropriate for your vehicle.
  2. Your budget: Some catalytic converter security devices can be more expensive than others. Make sure you find a solution that fits within your budget and provides adequate protection for your needs.
  3. The level of protection you require: Consider how often you park your vehicle in high-risk areas, and what level of security you require to feel confident that your catalytic converter won’t be stolen.
  4. Ease of installation: Some security devices can be installed yourself, while others will require a professional. Consider the time and effort required to install the security device, and whether you’re comfortable doing it yourself.
  5. Maintenance requirements: Some security devices may require regular cleaning or maintenance to ensure they remain effective. Consider the time and effort required to keep the device functioning properly.

With these factors in mind, you can choose the right catalytic converter security device for your vehicle and ensure that your investment is protected.


How To Pick The Best Vehicle Catalytic Converter Security Device

After looking at the most popular catalytic converter theft deterrents, you can choose the one that’s best for your car based on your budget and the level of protection you require.

As thieves discover how to get through less expensive security measures, owners of highly targeted vehicles like the Toyota Prius and Toyota Tacoma may decide to invest in better-than-average security.

However, the cost isn’t everything.

A good security measure will be created to fit a particular vehicle and constructed of materials that are difficult to cut, work around, or remove.

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