Grill Grates for Weber Genesis II/LX 400 Series - Heavy Cast Iron

Our review of these grill grates finds them best suited for backyard grillers who want heavier, heat-retaining replacements for factory parts. The biggest reason to consider them is simple: the cast iron core with a polished porcelain coating sears better and holds heat far longer than thin stainless replacements, delivering more consistent cooking and prominent sear marks. They arrive as a set of three pieces sized to match Genesis II/LX 400 Series layouts and feel noticeably more substantial than many third-party options.

Key Features

• Compatibility: Fits Genesis II/LX 400 Series (2017 and newer) including E/S-410, E/S-415, E/S-435 and LX E/S-440, replacing several listed Weber part numbers for straightforward swap in many grills.
• Size and package: Each grate measures 18.75 in x 11.12 in and ships as three pieces for a combined 18.75 in x 33.36 in cooking surface that matches the two-burner layout.
• Materials: Cast iron core with a polished porcelain coating provides a nonstick-like finish at high heat while preserving the superior heat retention of cast iron.
• Heat retention: The cast iron under the porcelain heats hotter and cooks more evenly, producing the strong sear marks that many users expect from a heavy iron grate.
• Construction: Heavier build at 15.83 lb and thicker rods (11.8 mm) improves stability and longevity compared with lighter aftermarket grates.
• Maintenance: The porcelain surface cleans with a regular brush and benefits from seasoning with oil after cleaning to prevent rust and preserve the finish.

Who It's For

This set is aimed at homeowners and grilling enthusiasts who want improved searing and heat retention over thinner replacement grates, and who are comfortable swapping parts on Genesis II/LX 400 Series models (2017+). It is particularly useful for those who value durability and a heavy feel that resists warping under frequent high-heat use.

Shoppers who need an exact factory fit should compare their original part dimensions before buying, as some customers reported fit differences. Those who prefer stainless steel or a lighter grate for portability should look elsewhere.

Pros & Cons

Pros

• Excellent heat retention and professional searing from the cast iron core.
• Polished porcelain finish makes cleaning easier and gives some nonstick properties at high heat.
• Heavy, thicker rods add stability and feel more durable than many replacements.
• Comes in a three-piece set sized for Genesis II/LX 400 Series grills.

Cons

• Some buyers reported fit variations, so measuring original grates before ordering is advised.
• The porcelain coating received mixed feedback from users and requires proper care to prevent wear and rust.

Specifications

Our Verdict

These cast iron replacement grates are a strong value for grill owners who want better searing and heat retention than many light aftermarket options. They are well suited to frequent grillers who will maintain the porcelain surface and confirm fit before purchase; when matched to the correct Genesis II/LX 400 Series model they deliver superior performance and durability for the money.

Frequently Asked Questions

Will these fit my Genesis II 410?
If your grill is a Genesis II/LX 400 Series (2017 or newer) including E/S-410, these grates are designed to fit, but compare your original part dimensions to the listed 18.75 in x 11.12 in pieces before ordering.

How do I prevent rust?
Scrape after each use, brush with oil after cleaning, keep dampers slightly open to avoid condensation, use a cover, and apply a generous coat of cooking oil for long-term storage.

Are they hard to clean?
The polished porcelain coating cleans easily with a regular brush and warm soapy water; soak to loosen residue and use a soft pad to protect the finish.