THE BBQ BRETHREN FORUMS

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The only real reason to go thicker would be if you're afraid that the 1/4" is going to wear out/rust out. It will not do you any favors on fuel consumption. I have had insulated boxes on both of my shirleys and I would never go without it. Its super nice, and its 2 layers of 1/4" steel... Its never wearing out!
 
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