Really cheap catalytic converter security...

Generation 2 catalytic converters are easily stolen with one cut to the exhaust pipe and the removal of the two spring loaded bolts that hole the intake flange to the exhaust manifold.

All it takes to remove the bolts is a ratchet wrench with a long extension and a 14mm socket.

Even of the pipe is cut behind the converter, making the bolts difficult to remove will make it hard or even impossible to remove without prior knowledge.

The method uses a couple of the 5/8 inch spring hose clamps that I have left over from the box I had to install my oil catch can.



Using a long reach pair of Vise Grip type pliers, I pinched open the clamps and snapped them over the hex head of the spring loaded bolts.

The potential thief will get a nasty surprise when the wrench socket will not fit over the hex head of the bolt, and the bolts cannot be removed. While under the car, using a flashlight, the clamps are nearly invisible to the thief.

If need be, the clamps can be removed with the same locking pliers or extended reach needle nose pliers.

 

On a Gen 2, if the other end is cut off, it is easily repaired with one of these and some muffler sealant.

It's cheap enough to get one in advance.
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1.75" Butt Joint Band Exhaust Seal Clamp Sleeve,45mm Stainless Steel Exhaust Sleeve Band for Exhaust Pipe, Muffler,Manifolds,Coupler

 

This method using the 5/8 inch spring hose clamp is so easy that I went out this afternoon and installed them on my 2012 Prius v. It will work on all Gen 2 and Gen 3 models including the Prius c.

 

No. I found that it was not necessary. The clamp stays securely in place by itself.

 

Yes, it's hard to remove unless you have a pair of extended length locking or needle nose pliers to pinch the ears to open the clamp to pull it off. The thief will try to push the 14mm socket onto the head of the bolt. The clamp makes that impossible without having to remove it first.

If the thief cuts the pipe at the back of the cat, it cannot be pilled off and he or she will not be able to make away with it.

He or she will not stay there for an hour to work on it or come back with more tools. They'd just move on to another victim.

The repair to a Gen 2 can be done with the butt joint connector sleeve clamp. For a Gen 3, it can be re welded together at any muffler shop at nominal cost.

For California and other C.A.R.B. states, it is not a $3k replacement.

 

Not all catalytic converter thieves are men.

 

I used these to install the clamps.




Triplett TT-200 LongLockers 15-inch Extended Reach Locking Pliers with Non-Slip Handles, Red, Silver, Black

It took no more than 10-15 minutes.

 

There is a vendor who sells these on Ebay. Close to $50 with shipping and taxes.



I prefer cheap.