Hongso Genesis II Grill Grates for Genesis II 300 Series - Cast Iron

In this review the Hongso Genesis II grill grates are evaluated as a direct replacement for 2017 and newer Genesis II 300 Series grills. The bottom line is that these cast iron cooking grids are best for owners who want heavy duty heat retention and clear sear marks without paying OEM prices. The review finds they fit the listed E-310, S-310 and related models, match the stated dimensions, and perform like durable cast iron grates while offering straightforward installation and cleaning compared with some other cast iron options.

Key Features

• Compatibility: Designed for 2017 and newer Genesis II 300 Series and LX 300 Series models, so buyers can expect a direct fit on supported grills.
• Material: Made from heavy duty cast iron that retains heat well, producing prominent sear marks on steaks and burgers.
• Dimensions: Each grate measures 18 7/8 in x 13 7/16 in including the stick out tabs, with a total combined span of 18 7/8 in x 26 7/8 in, matching common replacement needs.
• Certifications: Passed SGS testing to meet or exceed relevant safety standards, providing reassurance on materials and manufacturing.
• Replacement Scope: Sold as a set of two grates that replace part numbers commonly used on Genesis II 300 Series grills, making a full primary cooking surface refresh simple.
• Cross Compatibility: Also fits select KitchenAid 720-0954 series grills, increasing the chances it suits other compatible models.

Who It's For

This set is for grill owners who use a compatible Genesis II 300 Series or LX 300 Series model and want the benefits of cast iron: excellent heat retention and bold sear marks. It suits weekend grilling enthusiasts who replace worn OEM grids or who want a budget-friendly high-heat cooking surface without compromising on build weight or feel.

Those who should look elsewhere include owners of pre-2016 Genesis 300 Series grills, since this listing is the 18 7/8 in grate and will not fit older models, and buyers who prefer porcelain-coated or stainless grates for lower maintenance and different corrosion resistance properties.

Pros & Cons

Pros

• Solid cast iron construction delivers strong heat retention and pronounced searing.
• Direct-fit dimensions for 2017 and newer Genesis II 300 and LX 300 Series make replacement simple.
• Good value compared with OEM parts while matching the look and function of original grates.
• Passed SGS testing, which supports material and safety claims.

Cons

• Mixed customer feedback on rust resistance means regular seasoning and care are needed to prevent corrosion.
• Not compatible with pre-2016 Genesis 300 Series models and not the larger 19 1/2 in grate option.

Specifications

Brand	Hongso
Material	Cast iron
Fitment	Genesis II 300 Series and Genesis II LX 300 Series (2017 and newer)
Dimensions (each)	18 7/8 in x 13 7/16 in (includes stick out tabs)
Set	Set of 2 grates, total 18 7/8 in x 26 7/8 in
Safety	SGS tested
Also fits	Selected KitchenAid 720-0954 models

Our Verdict

The Hongso Genesis II replacement grates are a practical, cost-effective option for owners of 2017 and newer Genesis II 300 Series grills who want heavy duty cast iron performance and clear sear marks. They offer reliable fitment and good build quality for the price, but require routine seasoning and care to manage rust over time. For those with compatible grills who value heat retention and searing, they represent strong value compared with buying OEM grids.

Frequently Asked Questions

Will these grates fit my Genesis II 300 Series grill?
They fit 2017 and newer Genesis II 300 Series and LX 300 Series models listed in the product details; they are the 18 7/8 in grate and do not fit pre-2016 300 Series grills.

What are the grate dimensions?
Each grate measures 18 7/8 in x 13 7/16 in including the stick out tabs, with a combined coverage of 18 7/8 in x 26 7/8 in for the set of two.

How should I care for these cast iron grates?
Season regularly and dry thoroughly after cleaning to reduce the chance of rust; owners report mixed rust resistance so basic cast iron maintenance is recommended.