Grill Parts for Weber Spirit 300/400 Series Griddle - Cast Iron

In this review of the cast iron griddle insert for Weber Spirit 300 and 400 series grills, the bottom line is simple: buy this if you want a sturdy, long-lasting cooking surface that fits a wide range of Weber Spirit and Genesis models. The reviewer found the heavy-duty cast iron construction delivers even heat and weighty durability, making it ideal for burgers, fajitas and smash burgers. Fitment is a standout - it replaces multiple original part numbers and drops into 310-series grills with no fuss.

Key Features

• Wide compatibility: Fits Weber Spirit E310, E320, E330, S310, S320, S330 and many Genesis Silver and Gold models, so it covers multiple grill families.
• Heavy-duty cast iron: Solid cast iron construction provides excellent heat retention and even cooking across the surface for consistent results.
• Sunken cooking surface: The recessed design prevents small food pieces from falling through, keeping food on the surface while grilling.
• Replacement for many OEM parts: Serves as a swap for several original part numbers, simplifying repairs for older grills and reducing compatibility worries.
• Durable vs porcelain: Unlike porcelain-coated inserts, this cast iron option resists chipping and long-term wear when properly maintained.
• Seasonable non-stick: Becomes naturally non-stick with routine seasoning and light oiling after use, improving food release over time.

Who It's For

This griddle is best for owners of Weber Spirit 300/400 series and many Genesis models who need a direct-fit, robust cooking surface for everyday grilling tasks. It suits weekend grillers who cook burgers, vegetables and skillet-style dishes and prefer cast iron performance over thin sheet metal or coated inserts.

People who prefer a porcelain-coated smooth surface or who cannot manage routine seasoning and care may want a different finish. Also, if you have a grill model outside the Spirit and listed Genesis ranges, verify fitment carefully before buying.

Pros & Cons

Pros

• Excellent fit on 310-series grills and many Genesis models, so installation is straightforward.
• Heavy cast iron construction gives superior heat retention and even cooking for smash burgers and searing.
• Easy to clean after cooling and benefits from seasoning for a functional non-stick surface.

Cons

• Cast iron requires routine seasoning and care to maintain the non-stick surface and prevent rust.
• Heavier weight may be less convenient for users who prefer lighter, coated griddles.

Specifications

Our Verdict

The cast iron griddle insert is a practical, value-focused replacement for Spirit 300/400 and many Genesis grills. It delivers the even heat and durability cast iron is known for, fits original mounting points, and improves cooking versatility on compatible grills. Buyers willing to season and maintain cast iron will find this a long-lasting upgrade that performs better than many porcelain-coated alternatives.

Frequently Asked Questions

Will this griddle fit a Spirit E310?
Yes, it is designed to fit the Spirit E310 and other 300-series Spirit models as a direct replacement.

Does the griddle come pre-seasoned?
The insert is cast iron and benefits from seasoning; users should lightly oil after each use to build a non-stick surface.

Is this more durable than porcelain-coated griddles?
Yes, solid cast iron resists chipping and long-term wear common to porcelain-coated inserts when properly cared for.