GS4 Spirit II Grill Parts for Weber Spirit 2 - Durable Replacement Kit

In this review the GS4 Spirit II Grill Parts kit is evaluated as a no-frills replacement set for owners of Weber Spirit II 300 series grills who need reliable, OEMstyle parts at a lower price. The kit is best for someone replacing worn flavorizer bars, a heat deflector or cast iron grates on Spirit II S310, E310, E320 or S320 models; its single biggest selling point is that the parts are made from durable materials and are sized to match Weber original part numbers for a snug fit. The reviewer found installation straightforward and the materials noticeably upgraded from heavily corroded originals.

Key Features

• Compatibility: Designed to fit Weber Spirit II 300 series models including S310, E310, E320 and S320, which simplifies replacement without measuring custom parts.
• Stainless Flavorizer Bars: The five 15.3 x 2.6 x 2.5 in flavorizer bars are 304 stainless steel, which resists rust and distributes heat evenly for consistent searing.
• Cast Iron Cooking Grates: Two matte cast iron grates heat up faster and hold heat well, improving sear and cooking speed compared with thin steel grates.
• Heat Deflector Design: The stainless steel heat deflector has mounting tabs and vents to reflect heat, catch drips and boost smoky flavor without major modification.
• Direct Replacement Fit: Labeled to match many Weber original part numbers so owners can swap parts with minimal fuss and no drilling.

Who It's For

This kit is aimed at homeowners who already own a Weber Spirit II 300 series grill and want a costeffective way to replace eroded flavorizer bars, a bent heat deflector or cracked cooking grates. It suits buyers who prefer parts that fit existing mounts and want the corrosion resistance of 304 stainless steel and the cooking performance of cast iron.

It is not for owners of noncompatible grill lines or users who need single bespoke parts; also those wanting OEM branding or factory packaging should look to original manufacturer channels instead of thirdparty replacement kits.

Pros & Cons

Pros

• Fits Spirit II 300 series models and replaces multiple original part numbers, making it a practical onestop kit.
• 304 stainless flavorizer bars resist rust and have notches to improve ventilation and even heating.
• Matte cast iron grates retain heat well, offering better sear and durability than thin steel grates.
• Heat deflector design helps create smoke and protects burners from drippings.

Cons

• Matte cast iron requires seasonal maintenance to prevent rust, unlike stainless parts.
• Buyers must confirm grill size and model fit before purchasing to avoid ordering incompatible components.

Specifications

Package contents	5 flavorizer bars, 1 heat deflector, 2 cooking grates
Flavorizer bar material	304 stainless steel
Flavorizer bar dimensions	15.3 in x 2.6 in x 2.5 in, 16GA thickness
Cooking grate material	Matte cast iron
Cooking grate dimensions	17.5 in x 11.9 in
Heat deflector size	7-3/4 in x 4-1/4 in with corner mounting tabs
Compatible models	Spirit II S310, E310, E320, S320 and listed Weber part numbers

Our Verdict

The GS4 Spirit II Grill Parts kit is a practical, valuefocused replacement set for Spirit II 300 series owners who need durable flavorizer bars, a functioning heat deflector and authentic feel from cast iron grates. It offers a close match to original part numbers, good corrosion resistance where it matters and improved cooking performance from cast iron. Confirm your grill model first, but for routine rebuilds this kit delivers solid replacement value.

Frequently Asked Questions

Will these parts fit my Spirit II S310?
Yes, the kit is made to fit Spirit II S310 and other 300 series models listed, but you should check grill measurements before ordering.

Are the flavorizer bars stainless?
Yes, the five flavorizer bars are 304 stainless steel for better rust resistance and even heat distribution.

Do the cooking grates need seasoning?
The matte cast iron grates benefit from regular seasoning to prevent rust and maintain a nonstick surface.