Hongso 18 7/8 in Cast Iron Cooking Grates for Genesis II 400 Series

In this review the Hongso 18 7/8 in cast iron cooking grates are examined as a direct replacement for Weber Genesis II/LX 400 Series models made 2017 and newer. The bottom line: these grates are for grill owners who want heavy duty cast iron that retains heat for strong sear marks and fits models E/S-410, E/S-415, E/S-435 and E/S-440; the single biggest reason to buy is the cast iron construction that holds heat and produces pronounced searing while matching the original part dimensions.

Key Features

• Compatible fit: Designed to replace factory parts for Genesis II 400 Series (2017+) so buyers get a direct fit for E/S-410, E/S-415, E/S-435 and E/S-440 models.
• Cast iron construction: Heavy duty cast iron retains heat superbly, allowing for stronger sear marks and more even cooking across the grate surface.
• Exact dimensions: Each grate measures 18 7/8 in x 11 1/4 in including the stick out tabs, with the set totaling 18 7/8 in x 33 3/4 in, so replacement is straightforward without trimming.
• Set of three: Supplied as a complete three-piece set to replace all primary cooking grates in the 400 Series configuration, simplifying installation.
• Tested quality: The grates passed SGS testing to meet or exceed relevant standards, offering reassurance on material and manufacturing consistency.
• Replacement parts: Intended as aftermarket replacements for Weber part numbers 66097 and 66089 for owners needing like-for-like components.

Who It's For

Grill owners with a Genesis II or LX 400 Series grill (models from 2017 and newer) who want to restore or upgrade their cooking surface with heavy duty cast iron grates will find this set appropriate. It is particularly well suited to anyone prioritizing heat retention and searing performance over the lighter weight of other grate materials.

Those with older Genesis 300 Series pre-2016 grills should look elsewhere because the fit is not compatible, and buyers who need stainless or enamel-coated grates for stronger corrosion resistance may prefer a different material if rust resistance is a primary concern.

Pros & Cons

Pros

• Solid, heavy duty cast iron delivers excellent heat retention and strong sear marks for steaks and chops.
• Direct replacement dimensions for Genesis II 400 Series make installation simple and predictable.
• Set of three covers the full cooking area so no additional purchases are required to replace all grates.
• Passed SGS testing, indicating consistent production quality.

Cons

• Cast iron requires regular maintenance to avoid rust; some customers reported rusting after initial use.

Specifications

Brand	Hongso
Compatibility	Genesis II/LX 400 Series (2017 and newer): E/S-410, E/S-415, E/S-435, E/S-440
Replacement for	Weber 66097 and 66089 parts
Material	Heavy duty cast iron
Individual grate size	18 7/8 in x 11 1/4 in (includes stick out tabs)
Total set size	18 7/8 in x 33 3/4 in (set of 3)
Testing	Passed SGS testing

Our Verdict

The Hongso 18 7/8 in cast iron grates are a practical, value-focused replacement for owners of Genesis II/LX 400 Series grills who prioritize heat retention and sear quality. They offer a direct fit, robust cast iron construction and a complete three-piece set, making them a sensible buy for cooks who will maintain the grates and accept the care cast iron requires.

Frequently Asked Questions

Will these grates fit my Genesis 300 Series grill?
They are not compatible with Genesis 300 Series pre-2016 models; they are designed for Genesis II/LX 400 Series 2017 and newer.

How many grates are included?
The product is sold as a set of three grates covering the full cooking area for the specified 400 Series models.

Do these grates resist rust?
They are heavy duty cast iron and passed SGS testing, but cast iron requires seasoning and maintenance; some users reported rusting if not properly cared for.