Weber 70851 Summit 440 & 450 Cook Box

What Problem This Part Solves

The cook box is the structural core of the grill where the burners generate heat and food is cooked. Over years of exposure to high heat, grease, and weather, the cook box can develop cracks, corrosion, or structural damage. Replacing the cook box restores the grill’s cooking chamber, ensures proper burner alignment, and improves overall heat distribution and grill safety.

Key Features

Heavy-duty cast aluminum cook box construction
Designed for Weber Summit 440 and Summit 450 gas grills
Houses burners, Flavorizer bars, and internal grill components
Resistant to rust and corrosion for long-lasting durability
Genuine Weber OEM replacement part

Compatibility / Fits Models

Fits Weber Summit 440 and Summit 450 gas grills including:

SUMMIT E-440
SUMMIT S-440
SUMMIT E-450
SUMMIT S-450

Confirm model number before ordering.

Installation / Use Instructions

Remove cooking grates, Flavorizer bars, burners, and internal grill components.
Detach the damaged cook box from the grill frame and control panel assembly.
Install the replacement cook box and reinstall all burners and cooking components.

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FAQ

Does this fit my grill?
This cook box fits Weber Summit 440 and Summit 450 gas grills. Always confirm your exact model number before ordering.

What is this part made of?
The cook box is made from heavy-duty cast aluminum designed to withstand extreme grill temperatures and outdoor exposure.

How long should this part last?
Cast aluminum cook boxes can last many years, but they may eventually need replacement if they crack or corrode from prolonged heat and grease exposure.

How do I install it?
Remove the grill’s internal components and burners, detach the old cook box from the frame, install the replacement cook box, and reassemble the grill components.

Why choose this replacement part over others?
A genuine Weber replacement ensures correct fit, safe burner alignment, and long-term durability compared to aftermarket alternatives.