Miller CAT Catalytic Converter Shield | 6th Gen 2025+ Toyota 4Runner

Fitment Information

• 2025 Toyota 4Runner (6th Gen, N500)
• 2026 Toyota 4Runner (6th Gen, N500)

Fitment Note

Fits 2025-2026 6th Gen Toyota 4Runner, non-hybrid. For the hybrid powertrain, use the 4Runner Hybrid-specific Cat Shield instead. Requires the original factory catalytic converter with no suspension modifications for Miller CAT's fitment guarantee to apply.

Product Specs & Install Notes

• Complete bolt-on installation, no drilling required
• Durable aluminum construction, designed and manufactured in the USA for this specific vehicle
• Every cutout and mounting point matches the factory layout for a clean, secure fit
• Secured with patented tamper-proof security screws, each with a unique key
• Allows for easy engine and transmission oil changes, no shield removal needed
• 90-day manufacturer's warranty against installation or performance defects

The new 6th gen 4Runner is a real target, converters are a top pick for thieves because of the precious metals inside, and a stock underbody doesn't slow them down at all. This shield bolts straight to the factory mounting points, no drilling, no cutting, and it won't touch your factory warranty.

This won't get in the way of an oil change. Some owners will need it off for a transmission fluid service, so check your 4Runner's maintenance schedule for that interval.

Being straight with you here: this is a deterrent, not a promise. It makes the job slow and loud enough that most thieves move on, but a determined thief with enough time could still beat it. Still much better odds than leaving it wide open. For full underbody coverage, this pairs with Miller CAT's MCX Skid Plate for the same 4Runner.