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What's the most difficult catalytic converter protector to cut?

Discussion in 'Gen 2 Prius Main Forum' started by pri4u, Dec 1, 2022.

  1. pri4u

    pri4u Member

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    Hello,

    My Toyota Prius 2008 catalytic converter was recently stolen for a second time despite installing a cat shield after it got stolen the first time.
    I've been doing some research and looking for possible replacements for my existing no brand name cat shield protector:



    As you can see, it's very thin and based on the video footage, it took them only 5 minutes to steal it, despite my mechanic who installed it for $200, 1.5 years ago, told me that it would make it more difficult for them to do it and instead of 5 minutes, it would take them 30 minutes to steal it, but that doesn't seem like the case after the second time. A muffler shop also told me that the cat shield that I have is no good, and that he keeps seeing catalytic converters getting stolen with a cat shield like mine as he pointed with his finger to 4-5 cat shields like mine that were laying on his floor.

    Now I saw that CatMiller shield is the the leading brand, but is it really better? The metal ("plate" as one muffler called it) still looks thin and easy to cut, and it costs $300+? Also I heard that some people with CatMiller still had their catalytic converter stolen.

    I stumbled upon these videos by "Tesh Monkey":





    And what's being suggested by "Tesh Monkey" is to get rebar cage, one costs $8 in Home Depot, in minute 1:35 in the first video, he tries to cut it with an electric saw, and it shows that it gets heated and barely cuts anything.

    Are there good places that do this kind of custom work in LA for a reasonable price?

    So far, I found a private guy that does it here:

    LA STEEL & SPARK - 18 Photos - Hawthorne, CA - Yelp

    He used to charge $250 for this, but now he's charging $450 - He's using solid steel (4 inch long 3.8 inch wide), he claims none of his customers had their catalytic stolen yet, he says he makes it very difficult for thieves to cut through the metal, and it's going to make lots of noise when they cut through it. The price is a little expensive compared to the alternatives, but if it's really better than the alternatives it might be worth it.

    I also spoke with a muffler shop (3C Performance Exhaust) today, asked them if they do it, they told me they do custom work with stainless steel and it costs $300. They said it takes 3 hours to cut through it. That might a more reasonable option.

    What are your thoughts about this and do you have any suggestions as well? The goal is to find something that makes it very hard to cut through it, takes a long time, and heats up their saw but doesn't really cut much and makes lots of noise. I think this kind of thing, together with a car alarm might be a very good deterrent combo. Discuss.

    Thank you!
     
  2. Georgina Rudkus

    Georgina Rudkus Senior Member

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    An experienced thief can cut through anything if he or she wants you catalytic converter.

    I'd just get the cheapest shield and install it, Then, I'd paint the converter with high temperature orange paint.

    A smart thief, seeing any shield, would just move on to easier pickings.

    Sometimes just seeing a burglar alarm sign or a video camera will make the thief go elsewhere.
     
  3. PriusCamper

    PriusCamper Senior Member

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    Looks like you've done more than enough research... After my cat was stolen I was mad I hadn't put a shield on yet, but I also realized that the shield doesn't interfere with the easiest locations to cut the pipes in the front and the back. But the shield does make it harder to get the cat out. And the person who said it takes 5 minute vs. 30 minute in theft time was wrong.

    Without the shield a theft can easily be done in less than 60 seconds. With a shield it can be stolen in 5 minutes or less. As in a thief will most often keep searching for a less than 1 minute theft instead of risking a 5 minute theft. At least until they run out of 1 minute thefts...

    I wouldn't waste time upgrading to a better shield, I'd just put the cheapest one you can find on there and add a tilt alarm to car, maybe upgrade the volume of the alarm horn so it's loud enough to damage someone's hearing and then put the horn in a hard to tamper with location that maximizes the volume for the thief under the car. You can't really do much more than that...
     
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  4. pri4u

    pri4u Member

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    But what about the rebar custom work? Is that guy claim that it would take them 3 hours to cut is true?
     
  5. PriusCamper

    PriusCamper Senior Member

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    I'd have to see how it's anchored... Put a 10 foot breaker through that work and put a couple hundred pounds of force on the end of that bar and I bet those anchors that attach rebar to underside of the car start popping off. As in the under panels in the area around the cat doesn't have any solid steel main part of the frame you can weld that rebar to.

    But maybe he welds all that rebar only to the cat, in which case the steal the cat and the rebar that's attached to it?
     
  6. pri4u

    pri4u Member

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    Can you tell from the yelp pictures?
    LA STEEL & SPARK - 18 Photos - Hawthorne, CA - Yelp
     
  7. PriusCamper

    PriusCamper Senior Member

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    Yeah... There's some welds on there that'd hold up to a 10 foot pry bar, but not all of them. And if you're already under there cutting pipe it wouldn't take much additional effort to cut some of those bars. And welding is expensive and that's a lot of material. The design would be better if there was a metal plate hiding the location of all the bars. In these photos the thief could just pick the weakest welds or cut through the straps. This isn't worth the cost.
     
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  8. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    That's a good idea. I'd be inclined to weld round bar just bridging across the narrow, rear cut zone, maybe with steel tubing slipped over the bars, that'll roll when angle grinder of recip saw blade comes in contact. Then gauge plate over as you say, to hide where the bars are. Put some drain holes at the low points of that plate.

    It seems effective, but less likely to catch on, because it's not a "product in a box".

    I've done something at least, wrapping the cut zone with chain, secured with bolt/nuts, with thread lock on the outermost bolts. It would slow them down, have to angle grind through a chain link, unwrap a bit, then another chain link cut, and so on. Maybe they'd see it and just move on to easier target.
     
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  9. PriusCamper

    PriusCamper Senior Member

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    Another material that no one has tried yet is the kevlar they put in the chaps you wear when you run a chainsaw. If you wrapped that stuff around where they make their cuts the saw blade will get fouled up in that material like a chainsaw does, though maybe a sawszall wouldn't get as fouled as a chainsaw. You'd have to test it.
     
    #9 PriusCamper, Dec 3, 2022
    Last edited: Dec 3, 2022
  10. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Is it heat resistant, at least enough for cat wrap?
     
  11. pri4u

    pri4u Member

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    @PriusCamper @Mendel Leisk

    So basically my option are between this:

    300stainless.png

    $300

    custom made

    stainless steel

    3C Performance Exhust muffler shop

    Time to cut according to their muffler technician: 3 hours

    3C PERFORMANCE EXHAUST - 156 Photos & 184 Reviews - 2608 S La Cienega Blvd, Los Angeles, CA - Yelp

    Some reviews about it:

    300review1.png

    300review2.jpg

    VS

    450steel.png

    $450
    weld cages to vehicle around catalytic converter
    custom weld bar 4 inch long 3.8 inch wide

    thick steel

    bender

    metal wholesale supply house

    bar stack

    private person installer (not a shop)

    Time to cut: According to him, when they see solid steel they don’t even try (it's too much time to cut, and it makes too much noise - although he wasn't specific about time) and nobody from his clients had their cat stolen.

    https://yelp.to/fTIJD5gmovb

    for reviews and more pictures

    I'm thinking to get the $300 stainless one - because I'm worried that the $450 steel one could develop rust which could spread to the rest of the car - Also I don't think the extra $150 will make a big difference in cutting either one - your thoughts? Do you think there is a big difference between the stainless steel in the picture and the bender steel?

    Here's what I found about something that compares stainless steel and steel:

    steelcmp1.jpg

    steelcmp2.jpg

    Please advise ASAP as I just got a new cat and I don't want it to get stolen for the third time.

    Thank you!
     
    #11 pri4u, Dec 6, 2022
    Last edited: Dec 6, 2022
  12. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    They both look very effective. Go with the first, the $300 option? Looks less prone to grunge build up, and very skookum.
     
  13. PriusCamper

    PriusCamper Senior Member

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    I think the point you aren't getting here is there's no way to make it "difficult" to steal a cat. If someone is under your car with a sawz-all and they have more then 60 seconds, these cages don't stand a chance, with the $450 one taking more time... And if you want to maximize the protection putting a cat shield over the metal bars will make it more of a guessing game on where to cut. But again, a cheap $70 cat shield and a installing a tilt alarm on your car is enough of a deterrent and spending up to $500 more is a waste of money.
     
  14. alftoy

    alftoy Senior Member

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    An inexpensive theft alarm. Under $100

     
  15. alftoy

    alftoy Senior Member

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    Probably an inexpensive solution is to install 4" concrete curbs in your parking spot, just wide enough on either side of the cat, to make it difficult to reach the cat converter. Most 2-3 ton trolley jacks have a lift height of 15" at the front of the Prius, the Prius clearance is 5", so 20" for a body to slid under, less so towards the midsection of the car.
     

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  16. pri4u

    pri4u Member

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    I’m not saying it’s impossible to steal. All I’m saying is if it takes long time to cut and makes lots of noise that it’s a good deterrent to have!
    The $300 option guy claims it takes 3 hours to cut his stainless steel cage so how can you still say it takes 60 seconds? What’s “sawz-all? Looking at this video of sawz-all cutting a stainless steel it looks like makes lots of noise:



    And it seems to cut relatively quick but keep in mind they have to cut the cage in multiple places...

    Why you think the $450 would take more time? You mean a little more than 60 seconds? lol

    One thing is for sure, the generic cat shield plate I have right now is worthless because when the mechanic replaced my cat yesterday he simply used an auto screw device to unscrew it in 4 places and basically he got off the plate in one minute - so if the thieves bring a simple screw driver machine they can remove the plate very easily... they don’t even need to cut it.
     
    #16 pri4u, Dec 7, 2022
    Last edited: Dec 7, 2022
  17. pri4u

    pri4u Member

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    Do you have a link where can I buy it for an inexpensive price and maybe some pictures of it or how it’s used in action (presumably by you?)?
     
  18. pri4u

    pri4u Member

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    Sorry but no, you put an alarm under the car from the outside which can be stolen or disarmed before the act.

    A better spend for your money is get shock and tilt sensor on ebay for $50 and get it installed for $100 (that’s what I did).

    Here’s a video that shows how to install it:

     
  19. alftoy

    alftoy Senior Member

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    Google is your friend. Experiment by making a rectangle box out of 2x4s, shove it under your Prius and try get at the cat while car is jacked up. Easy enough to experiment if you have a couple 2x4s kicking around, or $5 each at Home Depot. 2x4s are 3.5 inches high.
     
  20. alftoy

    alftoy Senior Member

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    Did you watch the video? Alarm is not under the car, the PIR motion sensor is located under the car. If thief moves his arm under car, the alarm triggers under the hood.
     
    #20 alftoy, Dec 7, 2022
    Last edited: Dec 7, 2022