RE:What's this

It's a catalytic converter anti theft device! CatClamp encases the entire converter with a cage made from aircraft wire rope to prevent catalytic converter theft. Theives armed with battery powered reciprocating saws cut off converters in 30 seconds of time. CatClamp has two split collars with a security bolt, and key designed to lock tight to the exhaust pipe on either side of the converter. This allows it to be removed for adjustment, converter service, or other mechanical work. The wire ropes are permanently attached to the collar halves and two stainless steel springs prevent the wire ropes from rattling against the converter. Wire ropes are placed over and under the catalytic converters, and the two coller halves are bolted together and tightened securely to the exhaust pipe, creating a cage around the entire converter. The cage is locked into the vehicle frame or cross member with wire rope. It has "Security Device" in very large words with the VIN stamped on it. Made from stainless steel. $270 to $320 CatClamp.com