Yes, catalytic converter shields work. A heavy-gauge steel plate bolted directly under your truck physically blocks a thief's angle grinder, turning a 90-second theft into a 10-plus-minute ordeal. Most opportunistic thieves abandon a job within two minutes. For Toyota trucks like the Tacoma, 4Runner and Tundra, which consistently rank among the most targeted vehicles in the US, a cat shield is one of the most cost-effective upgrades you can add...